yup, you sure can, but why would you do that?
For looks? To the trained eye it would seem like a mistake. "Look he forgot his studs!"
Come on don't you want to be a longer stud guy?!?!? lol
If you are taking your wheels on and off alot then longer studs are a good idea, more to get your hands on to quickly whip them on and off
Longer studs are cool, although at £80 for a set they're not cheap
aftermarket lugs on oem wheels = no no lol