Have you ever blocked anyone on facebook?

Once I set up a profile years ago, I decided to block people I'd known during my lifetime who weren't so nice to me. I just went & found their profiles, then blocked them. I've done this with about 7 or 8 people so far.

Because 1)sometimes their profiles would come up under "people you may know" and I didn't want to see them (brought back unpleasant memories) and 2)even though I've never interacted with them on facebook, I feel better knowing they won't see my name or picture and 3) they don't need to see my picture or know anything about me.