Central Square war protesters: What's the point?

Timmah suggests that if the daily protesters were really serious about doing something about the war, they'd do it someplace other than in the bastion of liberalism - or at least do something like protest for mass transit to help wean us off our dependence on foreign oil:

... So they sit in the freezing cold to tell everyone they are opposed to a war probably 90% of Cambridge is opposed to? Boy, you're really getting your point across and making a difference. ...