I intentionally set it to less than 0 because I figured that it's safer to let the user make every change themselves- if there's enough demand, I might change that.
I also have a general "disable for this site" button ready for the next release. I like the idea of making it optional to just gray the disabled items out, or color code based on warning, but actually modifying the style vs just deleting it is a lot more work and would be unique to each site, so I want to leave that off until I have a working product for every site.
