They use the bullying as a means to recruit further, to be honest.
I'd say outright murder would work, but you'd need an effective means of doing so in the form of some kind of vigilante group; killing nonces, trannies, pimps, smackheads and sometimes, in more conservative areas, fags, is the first step in any rebellion - to show that you have authority, as a none-state actor, trannies are a natural target - unloveable freaks who a community is genuinely better off without.
The funniest thing is that nobody cares about trannies themselves - the real kicker is that when the Feds come after you, they're doing it because of the extra-judicial nature of the crime, not the dead trannies. The chances are, the state agrees with the dead trannies, seeing them as parasites, but is concerned about losing power and legitimacy to a third party.