Others are trolls in training!

Seriously, I once had a guy who fancied himself a humorist, who went on just before me and used some of my own material! When I went on, I made a total fool of him. It wasn't hard, he gave me a head start.
This was after the time this same guy sat on stage next to me and told a story right off my Seagulls& Summerpeople album! He told it exactly the way I tell it too!
I told him that it was traditional to borrow from each other, but, I wait until the source is dead
Tact is only noticed when it's missing..