Quote Originally Posted by Ceol View Post
Wouldn't that just let people make programs that tell the server a player avoided an AoE no matter where they are? There has to be some server-side validation.

It seems like this could certainly be a symptom of the 300ms delay, but it could also be due to SE's servers being so bogged down, they aren't processing the data in time. If that's the case, upping the update frequency would hurt them even more.
You can't assume people can arbitarily hack your client, otherwise there's no hope. Sure, the client is easier to hack than the server, but if you assume everyone can just godmode their client, your game is pretty much screwed. I mean, other MMORPGs don't have people walking around being invulnerable to everything. To do something like take control your client would actually be pretty hard and likely leave a rather easy to detect trial so you just got to have faith that you can catch that kind of stuff.