Just as random typing during a song won't get you a ban, a script that does the same won't.
I use autohotkey inside of Osu! a lot and never heard anything. I use it to bind some keys to click (because clicking with a pen is just too inaccurate) and to control my volume.
If you want to be save, add a line like:
[key]::Suspend
This will suspend all your hotkeys and will release them after pressing it again (keylist:
http://www.autohotkey.com/docs/KeyList.htm).
It's even possible to make a notification:
[key]::
Suspend
MsgBox [message]
return
To have it only show up when Osu! is running:
[key]::
Suspend
Process, Exist, osu!.exe
if ErrorLevel <> 0
{
MsgBox [message]
}
return
return
Let me know if it worked!
