A "no drama" policy doesn't mean people can't talk to the raid leader to have him/her talk to the problem player.

Geared Shadow priest not pulling nearly the DPS she should be? Point out their meters to the Raid Lead so he can get someone on that to help. Someone's gemmed/reforged/enchanting incorrectly or not at all? Point it out to the raid lead so he or someone he assigns can handle it diplomatically, rather than having player A get jumped by random other team members.

"No drama casual guild" does NOT mean "never ever critiques or helps people who are lagging behind to improve." It just means it's handled by the appropriate guild/raid team channels at the proper times, not during the raid itself via snide remarks and snippy comments everyone knows are directed even if they don't name names, even if they're thinking it themselves.

There's being a team player, and then there's being a jerk to make yourself look cooler to the team. Same as there's being a team player, and knowing when to sit out or stick to back up/alt runs if time to gear and practice are an issue.