I don't think you've heard the end of it. Especially after telling them to leave and get off your property. They will probably be trying to build a paper-case against you now, and will be looking for a way to go after your certificates, any way they can, just to cost you a ton of money to hire lawyers to keep your certificates, etc. If it were me, I think I would have just answered their questions, let them take their pictures, smiled, offered them coffee, shook hands, invited them in for supper, and let them leave when they were ready. After all, they can't behead you, but they may try to do so if they can figure out a way to force you into a courtroom. Especially since there was no romance in your relationship. Personally, they are the ones who issued my certificates, so I don't try to make enemies with them. The burden of proof is on THEM, and if you didn't land on a street, they can't prove you did. But they CAN make your life miserabe in other ways if you piss them off. Here's something you might wanna read about if ya get time:
http://www.avweb.com/news/avlaw/181788-1.html?redirected=1
Some good advice toward the end of the article about dealing with the FAA. I don't know about you, but I have better things to spend my money on than fighting with the FAA.
Here is another one for ya, the Bob Hoover Story. The FAA put this man through Hell. (In your situation, pay attention to the last sentence of the second paragraph. "The FAA can also issue an emergency revocation order if it feels that the person flying is a threat to aviation safety (AOPA, 1996)". (Emphasis added.)
There are a lot of lessons to be learned from the Bob Hoover story.
Read it and give pause, because it could happen to you, it could happen to ANY of us.....
http://www.collegetermpapers.com/TermPapers/Aviation/FAA_vs_Bob_Hoover__A_Case_Review.shtml