[WarriorCam]

I've seen someone who had it walking around with the motion blurs trailing behind them, so no, I don't think so.

Unless by that you meant they're the only one who gets the effect. In which case, yes, but everyone else can see it.

Edit:
Tested the global_motionblur gani and it totally freezes Graal and disconnects my messengers. My router starts flashing orange to indicate I have lost connection, AIM goes and it doesn't come back until I exit Graal, after which point I have to go into my attributes and change my gani before logging back in.