i wish more groups knew that it is not safe to communicate about grey-market business we do to survive on mainstream public platforms, no matter how many folks you think could be saved by knowing the specifics of your operation

If you organize these kinds of events, no you do not. You run "mutual-aid/help groups". And in them you might have old-timers approach new members to discuss these things, but what happens in them stays in them or at least in whisper networks. It makes infiltration by outsiders, something we desperately do not need when trans people already have such a huge spotlight on us, less worth it or even doable.