I don't really think so, nyc. DEA most certainly can watch sites like DB and actually get a lot of valuable info either by just reading posts or actually getting registered and cherry pick various members (they can easily set up accounts associated with fake identities and fake credit cards when payment to join the particular board is required to be made via a credit card), so I dunno think they have to actually wait for some particular discussion on the effectiveness of a certain OP for the raid to happen. In fact, a raid can occur when least expected, when people think all is going well and when the OP has actually gained the trust of the people, case in which the latter would not have much to discuss in relation to that OP.