More amusing than dumb, but around launch, was running a heroic with someone on Tatooine.
We were struggling through it, and I noticed in guild chat someone complaining about the crap smuggler he was grouped with.
I realized that it was the guy I was running with, I was the "crap smuggler", and he had no idea I was in the same guild.
We actually had a good laugh about it.
(I was a pretty crap smuggler TBH)