Probably the most efficient way for LE to browse Bluelight would be to register as members. Thus
JoeBlow, a friendly member who you've been talking to about innocuous things the last several months, could in reality be a DEA agent monitoring your posts and everyone else's.
That said, Joe is really putting his bust-time to poor use if he's monitoring this site for the big pop more than a couple hours a week (of course, he could be spending more time than that because he's actually come to enjoy it here), and of course
Lady Codone and her fellow members
never post info that could allow Joe or his cronies to make that big pop...