When reading weblogs, you always have to keep in mind that you are not reading editor-controlled news sources - so the language used can be offiensive. As long as you're prepared for that, you're okay. According to the BBC news, Tim O'Reilly has drafted a code that will warn readers :

Readers should be warned when they are reading blogs that may contain "crude language".

He came up with this code after the threats made to Kathy Sierra on blogs.
Although I think it's crap - surfing the internet has it's negative sides - I do understand. But this is not going to help. Even if it becomes a law to put the warning on any blog worldwide, it will just be something like parentl advisory on records and cd's : every artist will put it up if required and some will be proud of it. We need something else. We need a cop that picks up someone who threatens a person and puts him in jail for a couple of hundreds of years.