@maudlin27 I think the problem is being kicked, pretty unique to FAF by the way.
If a World of Warcraft (2005 era) dungeon party already accepted a paladin as healer, kicking him to take a priest is rude.
There is something to be said for people to become unkickable after a certain period say 1 minute. Saying they should expect it is like saying your personal wait time is worth less because your CPU is worth less.