What can I do to stop this?

[bounddreamer]

Same as Ekimmak, if I get a duty I don't like in roulette, I grumble, but I won't bail. I'll bitch out loud about it, maybe in FC chat or TS if the run goes long or wrong (RIP 45 min Lost City of Amdapor HM run) but when I join, I'm in there to do what I signed up for. That goes for mentor roulette too, even when it's something I'd really rather not do.

My job is already one of the easiest in the game. I may as well do what I can to make the load lighter for the rest of my party.

Try to find tanks to queue with you, either through linkshells, FC, or party finder. I never have to go into a roulette alone if I don't want to, mentor roulette being the only exception.