Not no way, not no how. It's not that it's been smoked by someone else, meaning, I 've shared smokes many times in my life. So If I was going to smoke it, unless the head was f'ed up somehow or soggy with spit, I wouldn't even clip it. But I would never pick that up and smoke it, more afraid of bad jokes, mean people and various other reasons. I just wouldn't smoke it. But not because it was smoked by someone else. However, I don't re-light a cigar if it's been "out" very long. I think relite cigars suck!
Hell I'm an old guy, and I still share a smoke with a friend every now and again...Know what I mean Vern?