That is beyond tacky, but places like PBK and BRU push it and I think a lot of people out there just don't know any better.
All of the merchants at The Avenues Webb Gin participate.
I even read an article in a Parent's magazine that said some parents are including a "minimum gift value" RSVP on their invitations to the kids parties.
and I thought it was tacky when someone said I should register for my house warming party a few years ago. I just wanted to show off my new place, not get presents! Although I still have the plant someone gave me...