On a similar line, I though that people could tag posts about mortgages, insurance, DIY and house maintenance etc as "adult content" on the grounds that it's not anything kids need to be worrying about.

Also I really really do get annoyed by the constant lumping of sexual content in with violence. The former is an enjoyable, perfectly natural human activity whilst the latter is definitely undesirable. But of course I don't need to tell the people here that!