I doubt the FAA has people whose "defined job duty" is "monitor social forums and tattletale to us".
However, that being said... somebody saw or reported SOMETHING...
Post 57 on
this thread and post 1 of this
subsequent thread, about the Heathrow 777 that landed short (and in which I used the word "FAA"; oops, I just used it again!) got me into a very interesting "letter dance" in February / March 2008 with the FAA.
Their office (DOT/FAA - ASW-752) was "conducting an investigation regarding information posted on a pilot community website regarding the Heathrow 777 incident." They advised that they would 'like to meet with me to discuss the information currently posted on the website.'
I received two letters from them, on 2/15 and 2/28, and had a telephone conversation with them between the two letters. In my phone conversation, I was cooperative and told them I'd be happy to answer their questions if they would simply indicate in writing the nature of their inquiry and how it relates to me, as well as what questions they would like to discuss. Their 2/28/2008 letter addressed none of those requests, but simply reiterated their desire to meet with me in person.
My 3/1/2008 reply informed them that the only possible reason I could see why they would want to meet with me is because they might feel that the "industry insider" I referred to in post 57 of the 1st thread listed above might be an FAA employee. I assured them that it was not, nor any other government worker, but a friend who is also a 777 pilot and who shared "jibber jabber" he'd heard on a professional pilots forum...
That's the last I heard of it. But I do think it indicates that SOMEBODY monitors, scans for keywords, or otherwise snoops around, or acts on snitch reports.
P.S.--They figured out my home address by matching my signature (which has first name, last initial and city/state) to airman records, I presume.