So my mother received a bridal shower invite during the week for her cousin's future DIL and when I went to visit she showed it to me. Here I was thinking she was just going to need my help purchasing something off of the registry online (my parents aren't savvy when it comes to online shopping).
Instead, she went on to say how they were registered at blueprintregistry and she couldn't believe the items on there. They were registered for airfare tickets and items for their honeymoon. The kicker (according to my mom) was that she was registered for her veil.
My mom called her cousin and asked what this was and her cousin went on a tirade apparently about how she didn't even agree with their registry.
My dad then entered the conversation and said he had never been so appalled by something in his entire life. They both agreed that they would be giving either a physical gift or money at the shower.
Now my parents are very laid back and easy going people who hardly complain about what others do, they just go with the flow, and if by chance they don't agree with someone else's ideas, they don't usually make a big fuss.
For my parents to make a big fuss about this, says a lot.
Just remember, when you think your family won't say anything about these types of registries, they may not say it to your face, but they will complain about it.
ETA: It's worse than I thought. Aside from normal, expensive registry items, I took a peak myself and they are registered for furniture, excursions for their honeymoon, gym memberships, dance lessons, house down payment, upgrading their house, and basically asking for guests to pay for their wedding: dress, veil, photographer, cake, catering, and decorations.