Not tacky at all, and no punishments deserved.
I've seen many clones wearing Colt grips. Everyone knows it's a clone, so we aren't fooling anyone. The objective is to get our guns to look as close to the original as possible, so they have the feel of the originals. If you wanna put real Colt grips on your clone, go for it!!!
And by the way, pictures will be required, or it didn't happen.
We like pictures around here!