How to block people on Facebook from commenting and liking what you post?

[Joe S]

Whenever you post a status, you will see a little lock next to the share button. Click this then choose custom. Where it says These People: choose friends only. Where it says Hide From, start typing your Mom's name and choose her name from the drop-down list. Click the checkbox that says make this my default setting. Then click Save Setting and she can no longer comment/like your statuses.

The problem with the answers above it that it makes your wall visible to nobody, and I don't think you want to block all of your friends from seeing your entire wall.