I'm thinking, call me crazy, to put on the bottom of my invites "rsvp online @ *wedding website*" to cut costs and headaches when counting RSVP's. From what I have heard, many guests don't even bother to send the RSVP's back to you. So that is stamps, envelopes, ink, and time wasted on my part.
Has anyone ever done this before? Is this even an option or is it really tacky?