When I was in 1st grade a boy invited me to his birthday party. I screwed up the invitation and put it in my bag (one of those old school cardboard suitcase types that my boys would be mortified to use) and forgot about it. Mum eventually found it and called to rsvp. I don’t know if she was more upset over my bad manners or that we were late to rsvp. At least the parent of the boy hadn’t seen me disregard the invite.
I am annoyed when people don’t rsvp, even if it’s a no. I am no party planner, but I do plan fun parties and I plan for numbers, people! So fucking call me next time.