Yes - all of the forums I liked to follow have gone quiet -
For, me the innocence of the early days - when posting images of your collection and talking about what you owned suddenly changed with the realization, that it wasn't only friendlies who were watching.
In short too many whack-jobs have made it a difficult endeavor on a public forum - perhaps if there is a closer vetting of members, but then, most forums seem excited to get more members and boost their advertising ability, the exact opposite of what most firearm collectors are interested in.