According to Marvin, Chris used to believe that Sonichu was his creation, but over time convinced himself that the Chus are real creatures in another dimension. Idea Guy seems to be exploiting that by posing as them somehow. It probably wouldn't have worked on Classic Chris, but current Chris is believing more and more in the alternate dimension stuff.
This is a good point.
I think that compared to classic Chris, who had no responsibilities to speak of, current Chris has a powerful need to believe in CWCville as a real place, because if it does indeed exist somewhere, then all it takes is for him to find a way to go there and leave his miserable life behind.
I believe this is why he's willing to accept stuff that is clearly pissing him off (like Rosechu being trans, and him tacking on Silvana to the gay marriage is clearly him resisting the Idea Guy's narrative), because all he's thinking about right now is how to get to this magical place he's created for himself, the rest is minor details that he can later fix with his anchuent psychic powers, similar to how he fixed the comic itself multiple times.
This is the real loophole that the Idea Guy is exploiting here. The only mystery right now is the "in", because there have been weens pretending to be Sonichu and Rosechu on Twitter for a couple months now, and Chris never paid attention to them at all. It is also a significant exploit, because after this saga is over, Chris will have to choose between his belief in CWCville and his desire not to get trolled through said belief again.
If I had to make a prediction, it would be that this troll saga is not the funny type (I believe all the funny has been sucked out of Chris by now), it would turn out to be the kind that reveals something new about Chris, in this case, it's how he perceives the world around him post-Tomgirl.
There is one funny side to this: Chris is officially the 1st person to get catfished by his own OCs.
