I have done almost 1000 arenas this season and i kid you not, i get out of combat constantly...like a bug or something.
And with this macro keybinded on the same key of your cheapshot on the stealth bar, you will constantly get random cheapshots on your target.
This happens constantly in almost every arena.
This can be bad in Arena but sometimes is really funny and i keep using this macro (since WotlK)
/cast [combat, nostealth]Sinister Strike; [nocombat, nostealth] Stealth
Take it with a grain of salt.
Random cheapshots are not always good.
But if you can see potential in this...be my guest and steal it
Dont tell anyone though