I only send requests to people I know will accept; but there was this one time when someone shamelessly deleted me from FB three days after adding me. Their excuse was that I was "on there too much," which was bs because I barely went on, and when I did I wasn't interacting with him in any way.
That probably happened on MySpace, but these days I never request anyone with whom I've never interacted in person before. When I get requests by these randoms I'm just like
I only send requests to people who I know will accept, I don't think anyone has ever declined one of my requests tbh. I barely go on anymore though and I probably haven't posted anything in over a year