Ever put off blocking someone ?

I give people chance and chance after chance after chance...and I put up with a Lot.. just to save the peace and just to not make waves. I've blocked only 3 people here in 7 years. It has to be pretty intense or bad etc. for me to do it. I hesitate b/c I don't want someone coming back and stalking etc, if you block them. But I am a human being with feelings and I am on the edge - Have you ever stalled blocking someone?