Sorry, but I need to vent. I am having a problem with my groups.

Every other group is playing like the world is going to end in 2 minutes. I pull a pack, lob my shield in there and immediately the whole shebang goes off. Heals, damage, the whole thing. Of course 2 mobs are running straight to the healer, my marked target to attack switches to the dps, while I try to save the healer. Pleas to wait for a Flash go unheard. I am not sure how to deal with that. If I say something, you only get comments like "L2P" or even worse.

People don't seem to realize that you have a 2.5 second GCD that you cannot circumvent as a Tank.