I am a member of American Family Association (www.afa.net) and have made numerous phone calls/emails to various elected officials concerning issues that we consider to be important. This includes signing/passing around petitions too.
I have never participated in anything like an actual march/protest or done illegal activies all in the name of a cause though.
__________________ "I don't know the key to success, but the key to failure is to try to please everyone."