I've been using BTC for a while. I've been using it at exchanges, to trade altcoins and to order goods over the Internet, but I've never exchanged BTC with someone in front of me. At a store or between friends, or family. This despite having had long conversations about BTC with various kinds of people, and attending a few meetups.
Who has exchanged BTC F2F?
I have never exchanged bitcoin face to face. I think this is unnecessary. If strangers want to trade bitcoin with me, I will ask a reputable person to mediate in this trading