Protesting
The goal: convincing more people to vote against George W. Bush, which means for John Kerry.
The Target: People who wouldn't have voted otherwise, or would have voted for Bush, or for Nader.
The Strategy: protesting in the streets near the Republican Convention.
The Danger: Compelling, accidentally, people who would have voted for Kerry to support the President instead in a reaction of solidarity with the President, and against the protestors.

Does it work? Could it work? How?

UPDATE: Protest picture/story here and here.