Search FOSTA or SESTA. It's an attempt to crack down on Backpage sex trafficking of minors, which would obviously be a very good thing. However, the bill (which many say is likely to be signed shortly) is so broadly -- and badly -- written that it may also shut down many hobby and other legitimate sites and really damage the open character of the internet.

I'm not entirely sure that shutting down Twitter would be such a bad thing (that's a joke folks, don't PM me) but the hobby will certainly have to adapt and change.