Well, the post isn’t, but if you have to worry about such things, check out the Firefox extension worksafer. The author has set up a service on his server to allow users to vote on sites as being SFW or NSFW, with the option to specify why you consider a site NSFW, from the following categories:
Pornographic images
Pornographic text
Pornographic video(s)
Artistic nude image(s)
Graphically violent image(s)
Graphically violent text
Graphically violent video(s)
Loud or objectionable noise(s)
Loud or objectionable music
Easily visible objectionable text
Other objectionable image(s)
Other objectionable text
Other objectionable video(s)
Distracting animation(s)
You can choose just how “worksafe” you need to be, as well. Cool!