"Be nice to us cause we're Federal Agents"??? How about just not be a jerk. I don't expect any of the Freq. flyers to be "nice"...but how about a little manners? Like don't ask the questions that you know the answers to and try to catch us in a lie. Don't slam your seat back or slingshot mine. Don't shove your crap right past my face into your seat without a "excuse me". Take your bag off of your shoulder so you don't smack everyone else on the plane as you walk down the aisle to your precious first class seat.
Do I know you made me? Yes...I can tell by the look in your eye. Does that cause me to scrutinize every move you make if you pay me too much attention? Yes. Will that get you interviewed on the ground if you do silly things like leaping out of your seat to see my reaction...yes. All of these things are done daily by your "First Class Elite". Like I said before. FFers wonder why the F/As dislike them so much....Because they have no manners.
Like an old F/A once told me, " There are first class passengers...and there are passengers who occupy first class."
I try to be nice to everyone...until given a reason not to be.

With that said...
Be safe and be friendly
FAMIAM