Here's a well-executed terrorist trap used by the UK once:
So, what do we learn from this?
First, having a sense of humor will get you a long way in catching terrorists. "I propose we operate a laundromat. That will catch them!"
Second, everything you say and do can be used against you. The disconcerting thing is that this did not require a warrant to determine where the terrorists were. The reason why it worked is that the terrorists were releasing data--their laundry--with the intent of it being used only in the way they intended. It's similar to the cell-phone story I posted earlier. We hand out our data, not expecting strange things to be done to it. We put our lives on Facebook. We blog. We send emails with all kinds of confidential data in them--reference Sarah Palin's email account getting attacked, or the Nikon camera sold on eBay with tons of top-secret UK government data on it. And we expect that other companies and governments will respect our privacy and not misuse our data. And they don't.
I'm becoming more and more cynical about privacy every day.