I'd never seen any of the yellow FT luggage tags until last Thursday. I was standing at the IAH C bag claim waiting for my luggage, when down came a bag with a FT tag. I watched to see who picked it up. Turns out there was a couple there who both had bags with FT tags. I would have said hello, but at this point I was exhausted, hadn't been home in over a week, and was mentally drained after dealing with the mess at MCO earlier that evening. I wasn't in my most social of moods, and since I didn't recognize this couple from a Do, I didn't bother to introduce myself. Had it been a different night, when I wasn't feeling so crappy, I definitely would have.