Given that it only takes contacting the wrong person randomly some day for that wannabe terrorist to become an actual terrorist, I'm inclined to believe the FBI is providing a useful public service in rounding up these people. And not just that, the media attention here also gives the wannabe terrorist pause before reaching out for help to improve their craft ("what If I'm talking to an agent?").

Assuming the transcripts of the conversations with some of the people involved can be trusted (hey, it's the FBI), the so-called entrapped are given plenty of outs and chances to not-do that thing they're doing. There's no coercion happening.