Posted 31 May 2012 - 01:48 AM
I once read a post on the Neoboards about someone who got frozen for using an auto-refresher. They said that they were simply using the F5 trick in Chrome, and that it may have possibly triggered a flag somewhere because Chrome refreshed faster than Firefox.
On the other hand, I've done refreshing with extensions like ReloadEvery with randomized times of a few seconds for hours on end, and it's not caused me any trouble. So if I had to speculate, I would say the speed of refreshing might get you frozen, but using a script with reasonable times probably won't.