Blogging is great for having a rant about those things that annoy you and you have to be carefull about liable laws but in a few countries in the world you are not even allowed to voice dissenting opinions. China, for one, has already sent 62 cyberdissidents to prison for publishing articles online about things that the Chinese Government don't allow thier citizens to write/complain about.
Arash Sigarchi has published a book on how to publish things that governments rather you didn't and its available as a pdf download from the site Reporters sans frontières - Handbook for bloggers and cyber-dissidents
Reporters Without Borders has produced this handbook to help them, with handy tips and technical advice on how to to remain anonymous and to get round censorship, by choosing the most suitable method for each situation. It also explains how to set up and make the most of a blog, to publicise it (getting it picked up efficiently by search-engines) and to establish its credibility through observing basic ethical and journalistic principles.
Something for everyone then.