I try to be a nice guy, I really do. But when you hit a LFM, be ready to quest. If you need a ride out to Meridia, don't wait until the entire party steps in to let us know. If you want to level before a quest, go do that THEN hit the LFM. Go buy your pots/scrolls/etc in the downtime between quests. If it's mission essential, like say curse pots, let someone know as soon as you join what you plan on doing. Someone may have a stack, if you are #12 the divine might tell you not to worry about it, he'll take care of you. We all faceplant from time to time on resources, it happens. Just don't punish a party because you forgot.
The point is, when people put up a LFM it means, "Join if you want to run this quest", not "Join then go do character maintenance." People don't have to be ***** if you don't give them a reason.