Druid speed hacking - "Worth it"

There was a 30 druid from Moonrunner in my warsong gulch who was using some sort of speed hack, he appeared to jump forward about 15 yards every second while running. He capped the flag 3 times in 2 minutes and was never in range to be hit.
I hopped on one of my moonrunner characters to ask him why he was doing this, and told him he would be banned. He responded by telling me "Yeah 24 hour ban, its worth it."


I've been hearing about speed hacking and floating and all sorts of glitchs since vanilla. Clearly temporary bans are not effective, why hasn't this stuff been fixed or perma banned?