[dangerface]

Blocking you is a way of saying "Leave me alone!"

Thats an assumption it could have been a mistake, it could have been temporary, it could have been any number of reasons. Maybe there is a good reason they blocked you, if you knew this reason maybe you could fix it or accept your differences and move on, both good social outcomes for both parties.

You are being anti-social by assuming other people actions. You also assume that the other persons action was also anti-social. You then assume that doing the social thing and talking to the person in a reasonable manor will be treated as unreasonable and anti-social (this makes sense if you think they are anti-social). So you don't ask, their anti-social behaviour is never questioned and they carry on with it. They probably blocked you for a reason, you were being anti-social but since you never questioned that reason you too will carry on with it.

This anti-social behaviour encourages itself.