What do you guys think of us requiring that the guest be on the list in order to gain entry to the wedding. If they RSVP'd then they will be on the list, if not then they wont.

Lets face it, people are rude and sometimes inconsiderate, they will bring a guest without permission, they will NOT RSVP & then show up. So... I thought that I would have someone at the door with a list and they must be on the list with the proper number of +1's.

Is this rude or is it ok?