Technically yes, but the worst I've ever seen happen to somebody with a link in their name is getting renamed by an admin. I doubt very much anybody would issue a serious punishment for it, it's mostly tolerated.
Sorry, but I must clear something up here. Ghosting is allowed in some places. As stated in the rules "An exception to the ghosting (2g) rule is when the player in question is breaking jailbreak specific / game server rules. Examples include LGKA reminder, AFK blue, ammo glitching, etc."