If you have a web site, you can learn more about legal issues that you may run face first into in the shape of cease and desist orders, subpoenas, or disputes involving your domain name. A site on those subjects, and copyright, trademarks, defamation, and others, has been put together by the Electronic Freedom Foundation and law school clinics from Harvard, Stanford, Berkeley, and the University of San Francisco Law Schools.
The name of the site is chillingeffects.org and the title is an apt description of what happens to people afraid to express themselves when they are fearful of oppression in the form of legal actions against them. The Frequently Asked Questions section has some great information on a number of topics. For example, check on the section on John Doe lawsuits.