Why Block legitimate members?

This always really bugs me: when users/members here block other legitimate/real people here who have like-minded interests. It really makes no sense. Just my rant for the day.

For instance, I don't know why https://xhamster.com/users/bigdickster has blocked me. I have done nothing to be blocked by him.
It just rubs my rhubarb the wrong way when people block others for no apparent reason.