When has this tactic (opting out to force change) ever worked on problems of any meaningful scale before? Please don’t say the civil rights movement, because those boycotts were not effective on their own. Pressure is required to force change, and opting out does not produce the necessary pressure unless it is genuinely a significant portion of users and lasts years.

These strategies have been tried time and time again and have proved not to be strong enough to overcome economic forces.