Always wondered this, but don't want to start a new thread about it, but this is the closest I could find to my subject.

I have always wondered, how much can you say to a FAM without getting in trouble? By getting in trouble, I don't mean them questioning you, but actually doing something illegal? All too often I feel like making an off hand remark to these people, but don't know how far I can take it. Would a "Thanks for protecting our country?" (sarcastic or not) be ok, or would I get in trouble for that? Would love to hear the exact law, and I am sure it has been covered here before.

Also, my understanding is that FAM's "take" the seats fromt he airlines, as in they don't pay for them, right? If so, why do they also get lounge access, or at least that's what the RCC admit policies say on international flights?

Thanks, and sorry for what I am sure are repetitive questions.