You guys are silly. The only way to tell if autohotkey was running is to check for the process. Autohotkey has plenty of great uses and isn’t just for running bots. It wouldn’t be smart outright ban it.
I use autohotkey from time to time because holding down the right mouse button all the time is kind of annoying. I use autohotkey to rearrange keys in other games.
Arenanet will probably only ban people if they are shown to do the same actions over and over perfectly with no change in behavior. They won’t check to see if your right mouse button is held down.