Originally Posted by
Blkunxpd
It doesn't matter if you have him as target or no, your shot will drag his attention if he have no target at all at this time.
There is legit way (simple harm macro) you can make for swd being used once you have hostile unit as target (which is auto triggered upon someone attacking you if you currently have no target)
There is difference between scripters and people just getting advantage of weak mechanics with macros (which is legit)