@Sturgis,
Sturgis wrote:These days the use of a computer is as equally valid and useful as taking part in door-to-door speaking, protest marches, phonecalls and other methods.
All depends how you use that computer, no? For random example, when a dangerous bill is about to be passed (see last year's health care law), campaigners always stress that calling the office of your Congressman/woman is more effective than emailing them, and tweeting at them has basically no effect at all.
You can reach millions online if you build a successful YouTube channel or the like. Many impromptu protests, especially in authoritarian countries, are successfully organized online. It's possible to use Twitter to rouse a journalist's interest in a campaign, publication or story you care about. Or to join in a social media campaign for a specific cause or event that might, especially if it's short-term and specific, attract political or media attention if enough people take part.
But arguing day-to-day politics or the same debates over and over on a web forum with people whose minds are equally made up ... I mean, I do it too. Sometimes you just want to, or need to. But an effective tool for political advocacy it's not, really...