No Ring, NO BRING?

Let me start by saying I am OVERJOYED that not one, but two of my good friends are getting hitched. :)

Talking to married friends around the office.. when it came time for their invitations, it was: NO RING, NO BRING!

Soo, essentially, unless you‘ve already signed your life away are engaged or married, you are NOT allowed to bring a plus one.

I understand the financial part of this, but DUDE. Weddings are terrible for single people, at least allow them the courtesy of possible post wedding debauchery.

How do you tell a single person they have to come alone? Messed up or not?