Add way to exclude site from style or create priorities of styles

[ikciwor]

I have one style for facebook only and one global style for other sites. When I open facebook these styles begin to collide and it looks very messy. This could be solved either by adding "applies not to" in style editor or blocking styles collision and introducing priorities. Or is there another way to solve it? Regexes are not nice, they are not obvious for typical user.

[oatmealine]

Regexes are not nice, they are not obvious for typical user.

That's not an excuse to not use them. Here's an exclude domain regex to get you started:
http://www.(?!SITE DOMAIN HERE).*