Trust me the FBI will be knocking on your door after they have tapped your phone, bugged your house, opened your mail, followed you, anyone connected to you and all for at least 4 weeks if they even dreamt you were a friend of a relative who once met a terrorist sympathiser.
Let me explain to the simple minded how it works. These guys are goverment employees who happen to be in favour again, they have the budget and long to have more to spend, so the more work the better.
Plus can you imagine who's head would roll if it came about in the future that you were a terrorist, but the phone call tipped you off?
Good wheeze though had you fooled.