OK rockbilly.... you "irritated" me to the point I had to dig a LOT deeper. Here's what I found if you're interested. If not, you DID help me by making me do some research:
The government doesn't have the time or resources to track these smaller sites, instead, it relies on citizen "cyber-spies" to do some of the snooping for them. These civilians are unrestricted by laws of entrapment. When they come across something they think might be of interest to the government, they forward it to appropriate military or law enforcement authorities. Then the government can follow up on "probable cause." Apparently, there are A LOT of these guys snooping through sites and chats. 7-Seas Global Intelligence is one group that turned up several times. They go so far as to entice people to say things that will give the government some real meat to pursue. Pretty nasty business, but they have helped put several people behind bars.
Since many of these people have their own agendas, I guess you are correct in saying this site is just as likely to be monitored as any other. I am sure some of these guys are probably anti-gun fanatics, and would LOVE to turn someone in who was willing to sell a gun to a known felon.
There was also a law passed in '97 that allows the government to "monitor" sites, but they can only do so with a court order (or they violate the Electronic Communications Privacy Act of 1986). The FBI can search the web using Carnivore (the system that looks for key words and phrases), but it can only pursue tips with the court's permission.
Bottom line....THANK YOU! You forced me to educate myself. :oops: