I like that idea. I heard there was something you could do with CSS to have them be a different color, but I haven't figured out how.

If link to content starts with funnyjunk.com/nsfw/, then color notification text NSFW.

Requires Javascript to parse the link.

You can just use the ^= selector

There's ways to color certain URLs in CSS.

a[href=blahblahblah] {
color: blahblahblah
}

I've tried it though, it doesn't work for some reason.

Mod extension has it as an option in features

a[href^=/nsfw