Opt-Out invitations (regrets only).

rages You’re what’s wrong with America!
And I agree with Sleeps. Regrets only is a kindness because it removes the RSVP burden from some of the recipients. If you’re cranky because it means you have to respond saying you weren’t coming, tough shit, with a traditional invitation, you’re supposed to respond regardless of whether you’re going or not anyway.

Reported.