IT´s a problem because you can track anyone and find anyone easily. No competition, no pressure on where he could be just a gps system.
IF you are seeking for a criminal as a police officer, relax by just doing /gps and following the road so the criminal cannot hide or loose the wanted level.
If you are a criminal and want to take revenge on somebody, simply /gps and follow the road to get to your target very very easily, so the target has nowhere to hide rendering hiding useless.
With /loc, the person could change direction anywhere, the one tracking him had no idea if he was going up right left down. With this gps system, if im trying to hide from a bunch of police officers then its impossible, same goes if im trying to hide from a person so he won´t take revenge.