1) You can see/target spies (ofc), but you cannot attack unless you legitimately see them.
WOOT, and if one plays this well, he/she won't be to obvious.
2) Noone can see you targeting the spy except people who use this cheat too (Possibly GM's too so be careful).
I would be inclined to think this would be common sense but someone will get themselves in trouble. lol
3) Gives BH's a good chance at revealing spies accurately.
Going to piss off a spy or two lol.
4) Allows profs to anticipate spy attacks.
Now see, if one isn't careful and seems to always, or almost always "anticipate" a spy attack, then there are going to be spies that go crying to GMs.
5) Commando's can use free-target weapons to kill a spy who's cloaked with pin-point accuracy.
No more pray and spray ;P. Commando's can start using the "force" to assist in targeting

.
6) Anti-Cloak can be used to make sure no-one is watching you hacking PvE stuff or w/e like walkin through walls, laghacking passkey doors.
Yeah this def would be handy.