I don't this for sure, but I had heard that sometimes, as a part of the plea bargain, they require you to stop any involvement. Basically, it means that you have to go "undeground" and not maintain a public personna.

As far as TER postings, TER walks a thin line between "free speech" and interfering/contributing. That's something else that helped bring down the Tampa operation. They got popped for facilitating criminal activity.

Yeah, it smacks of first ammendment rights violations, but the courts typically side with LE in these types of cases-it's in the "public interest".