Quite a few bloggers have been running their content through this website to get the equivalent of an MPAA rating.
Here’s ours:
The rationale for this rating?:
This rating was determined based on the presence of the following words:
* drugs (5x)
* death (2x)
* pain (1x)
Well, a blog about drugs and drug safety is going to mention all of these terms. But I was still anticipating a G rating.
Abel Pharmboy's Scratchin' Post 
Death and pain (and danger) are big keywords for these guys. And context is (of course) totally ignored. My blog’s danger quotes are all about the government … those R-rated guys Aelxander Hamilton and David Hume. Add in a couple of refs to deaths and suicide (Salman Rushdie) and the rating jumps to NC-17.