Until devs crack down on it, in DAoC (Dark Age of Camelot) people used radar for a couple years to gain advantage in pvp. Got to point that if you didn't use it, you were at an extreme disadvantage, till one day Mythic posted that they'd banned about 15% of the player base due to using said radar, after that no one dared to use it again.

I'm fairly certain that if a small company like Mythic, could detect radar hacks back in early 2000's, SE has no problem tracking it currently.