People are idiots.
I was on one of my fighters and saw an LFM for Invaders! and thought, "Hmm. I could use a few more tokens to get my rogue a ring of balance."
However, I saw that rogue wasn't in the LFM. I messaged the leader, a ranger named Amtpia or something, asking why. His reply was that there were no traps in that quest.
I told him, "Ok. Gonna just squelch you now, so my rogue won't ever group with you," and promptly squelched him.
I suggest that's what all rogues do, and then when they need a rogue for a quest, then they'll be assed out.