Looking into this further it really falls in the same line as using any of the boxing software: Its not directly supported or officially condoned by Blizzard and we use it at our own risk.

To further this here is an actual Blue post reply:


I can't give you permission to use it as I don't really know how it works. If it just makes registry changes, it's probably fine. If it's an actual program running alongside the game, it may not be such a good thing to use. As it's not made by us, I can't really condone it's use, but from what I was able to see by Googling it, it looks ok, but that's my personal opinion, not a blanket endorsement. I didn't see anything indicating it was dangerous though.
Blizzard Technical Support


Actual thread: http://forums.worldofwarcraft.com/th...14471797&sid=1

Reading through the wtfast site its basically an optimized proxy service. I don't see how that's against TOS..