Possibly, and here would be my counter-arguments:
You can just hold spells in front of someone’s face (like light), so I don’t see why you’d remove the spell from sticking.
Fireworks - very weird
Portals - Acceptableeeeeeeeeeeeeeeeeeeee, I did like the portals more though. I made the same suggestion a year ago. "Troll-Porting" : Portal Yes/No prompt and probably others.