I first read this as you sometimes drop in on people you hate just to hear their doorbell ring. LOL, Pepper, you make me laugh even when you don't mean to! I pictured you doing the ring and run kids do.I never liked people showing up unexpectedly. Although I must admit that I have dropped in on people I hate it to hear the doorbell ring. I have never liked being surprised, even a good surprise.
If we're talking strictest courtesy, I would never ask someone if I could visit, I would wait for an invitation.I never call on people without asking first, and I expect them to show me the same courtesy. That is what it is...courtesy. Just as I think it's wrong to phone people after 10pm (except in an emergency).
I agree with you about phones, though. While I don't mind people dropping in during the day, I don't like phone calls after about eight. We're settled down for the night by then.