The issue isn't SMN themselves when maintaining hate, it's when we get a SMN spammin DoTs and a single target hitting DPS. You're going to lose hate on a mob, either the SMN takes one or the DPS does, it is very difficult to swap fast enough to keep hate on all mobs. This is not an issue with 2-pack pulls, the issue start when it's 3 or more. This is especially true if the SMN or DPS or both outgear the tank in question.

Quote Originally Posted by Kevee View Post
Uhh. they can flash more.
Most pug tanks I see flash, once, and think that's OK.
I have no guilt about pulling off of them every time until they learn you need to flash more than once.
Flash isn't as potent as you seem to believe.