Reasons TERFs should get into t-porn:
1) most t-porn is very dickish and is basically gayAF (either a cis man banging a pre-op HSTS, or pre-op HSTS "transbians" banging one another), perhaps if TERFs see how most t-porn is virtually indistinguishable from gay porn they might stop worrying about getting raped by trannies: "Oh, now I see, trannies just wanna fuck eachother and cis guys. OK, these guys are basically all homos, I am safe." (Yeah, I know,

)
2) God forbid, they might like it. I mean, Sheila clearly has her favourites. Even if it's not necessarily arousing, some of it is quite amusing because it's so plainly ridiculous in a "So this is what the boys get into when they're left alone to play by themselves" kind of way. I can't imagine any cis woman looking at some of the "forced feminization" stuff and not ROTFLHAO. I can totally see why that femdom stuff has Sheila's preference.
3) "Follow the leader": A lot of TERFs have a follow-the-leader attitude when it comes to their Alpha female influencers, so if the Alpha female within a TERF group watches t-porn "for research", the rest of them feel obliged (or justified) to do the same thing "for research.".
4) Some t-porn movies explicitly reference and perform TERFs' own dystopian #ThisNeverHappens nightmares about trannies. For example, my personal guilty pleasure,
The Intruder, that movie is basically everything TERFs have been complaining/warning everyone about ("trannies will infiltrate women's private spaces and steal women's culture away from women!") but told from the perspective of a sadistic trannie, who of course provides a very masculine answer to a very feminine problem. Another t-porn movie shows the same trannie getting caught masturbating in the bathroom of a dance club by a huge fat TERF, with the TERF going absolutely batshit on the trannie: "WHAT ARE YOU DOING IN MY STALLS? DO YOU WANT ME TO CUT IT OFF? DON'T THINK YOU'RE BETTER THAN ME JUST BECAUSE YOU HAVE DICK!". I think it might be instructive or even cathartic for TERFs to see their #ThisNeverHappens nightmares performed like that.
5) Who doesn't want to see
Gender Swapped By Aliens?
Reasons why TERFs should avoid getting into t-porn:
1) Most TERFs are anti-porn in principle so all porn is repulsive to them including t-porn. Given their strong principled aversion to it they risk getting secondary trauma just from watching it.
2) Even if they are willing to tolerate the human penchant for recording sexual activities and showing them off (most TERFs find any performed sexual act to be inherently degrading and dehumanizing regardless of who's performing for whom or in what context), everything TERFs hate about mainstream porn and consider to be degrading and dangerous to female performers is right there in t-porn: gagging, choking, slapping, deep throat, unprotected PiA, A2M, fisting, wide gape, etc. Even non-BDSM titles include "rough sex" acts borrowed from BDSM.
3) Anti-racist/intersectional TERFs will hate t-porn for being blatantly racist. If a trannie is visibly Hispanic/Native-American, they are cast to play a hired prostitute to the white cis male or white HSTS protagonist who is cast as their rich client. The titles of the movies will sometimes suggest that coloured trannies are prostitutes hired by the cis white male performers. Titles like "Asian Invasion" suggest "yellow fever" or Western sex tourism in developing countries.
4) Marxist TERFs will become enraged at the class war depicted in t-porn. Trannies are cast as service industry workers (repairmen, baby sitters, secretaries, prostitutes) who have to perform sex acts for their bosses or richer clients in a workplace context. There is no Wilhelm Reich-esque orgy amongst the working classes themselves with comrades enjoying eachother.
5) Some t-porn references pedophilia/legal minors by depicting the "barely legal" performers - who are pre-op feminized gay boy adolescents - as teenage school girls. Some of the OnlyFans accounts are run by porn addicted legal minors lying about their age while making underage content available because they are emulating their favourite porn performers. Whereas a decade ago t-porn actors were actively trying to discourage young HSTSs from going into t-porn to emulate or gain access to their favourite performers, nowadays t-porn actors will openly flirt with and encourage transtrender teenagers who are legal minors to get into t-porn. This is not some rightwing conspiracy to associate trans people with pedophilia, it's a documented fact that the LGBT as a whole has become more nihilistic/blackpilled when it comes to their failure to protect minors from adult content.
6) This might sound weird but TERFs who have a competitive attitude towards trannies - ie, they feel like these men-in-dresses are trying to outmanoeuvre real women - those TERFs might end up
feeling excluded themselves, because, again, most of t-porn is gayAF and depicts a secret world of male debauchery where biological women have seemingly disappeared entirely, which is exactly the dystopian scenario painted by TERF godmother Janice Raymond in her 1970s TERF Bible,
The Transsexual Empire: a world where biological women have been rendered sexually and functionally obsolete and have ceased to exist. Granted, nowadays it's more acceptable to include cis women in t-porn in a complementary way, but it's still overwhelmingly gayAF and actually devoid of females. I suspect that part of the reason there's a new wave of TIFs who are not self-loathing lesbians but aggressively thirsty transtrender straight women who fetishize gay men and demand sexual access to gay men through trans identification, is because these women do view any male-only sexual subculture that excludes women as "the last sexual frontier" that they have yet to infiltrate and explore.
7) Some post-op performers (with either top and/or bottom surgery or with silicone injected to their face/bodies) do look disturbingly artificial or outright mutilated. All the usual TERF objections about "women mutilating their bodies for the sexual pleasure/amusement of men" apply here as well.