No, it is NEVER okay to do this.

There are rules that can (and should be) thrown out the door. There are rules that are okay to bend. There are rules that I think should be written. But there is one rule that will never ever ever be okay:

It is not, under any circumstance, appropriate to include where you are registered at on your wedding invitation. NEVER.

And yes, I put that in caps because I am screaming it.
The end.