How do I disable the spam filter in Gmail?

I'd like to disable the spam filter in Gmail, how can I do this?

From web app Senseful

• 1. Create a new filter in Gmail.
  2. Enter is:spam in the Has the words: field.
  3. A warning will appear warning you not to use the word is: in the filter, you can safely ignore it by pressing OK.
  4. Check the Never send it to Spam checkbox.
  5. Click Create Filter.
  From Senseful