You can not take off your wall, but you can make it so no one
can post on your wall. Here's how:
1. Click Privacy Settings
2. Click the bubble under Custom
3. Click edit settings next to "How you connect"
4. Click the button next to "Who can post on your wall?"
5. Click "Only Me"
6: Click "Done"
Than only you can post on your wall :)
If you need any more facebook questions answered just message me
:D