Yeah, Player Search is used in stalking, however if the stalker also has several of the team members as friends (which is unfortunately the case) then they can pretty much stalk them all at once, where as Player Search would need to be reset and spammed for each different player name.
Just close/open the Friend List for an updated stalkees location.
Also, they can find out what CW Server you are on too, which Player Search doesn't do.