I've watched conversations on this forum over the years that I was sure was two fed agents talking to each other (or maybe one posing as two). The things they said were too canned and definitely not the way real people talk. The answer to your question is yes. I've seen it here.
Sometimes it is very strange! You say to yourself: What are these people doing here? They join a forum about a specific issue, such as Bitcoin, and then talk of how bad Bitcoin is and that it is dead, dangerous, criminal or whatever. I cannot understand, what motivates people to do this? Because there is no "bitcoin-hatetalk.org" ?
A market niche?

BCT has always been a stick of dynamite for lazy law enforcement. Do you know how to fish with a stick of dynamite? Take your boat to the middle of the lake and throw a stick of dynamite in the water. After the explosion scoop the floating fish off the surface. The internet is the lake and this forum is the dynamite.