When you block someone, you can still see their replies under wallposts, skins they upload, and when people share their wallposts (it says you can't view it but you shouldn't see a shared wallpost from a blocked person imo.)

People block people for a reason, I believe when you block someone or they block you, you should see nothing from them.

I'm sure this would be hard to make it so you see nothing from the other person or they see nothing from you, but I think it would be a good idea to try and add/fix these problem.