WoW has always had a flood control method. If you send too much data to the server FROM A SINGLE IP then it will disconnect you.

It seems like they screwed something up though and it sends too much data - leading to disconnects.

I am just now getting around to testing autofollow. It certainly sucks (more for some classes than others) but it does not seem to hurt my mages much - most all of the spells I cast in combat are instants. If anything, it will help me spread out a bit more and make me less susceptible to aoe spells.

Further testing is needed though.