Please don't do that. While I can understand your frustration of UA's change policies and want to protest this stupidity, please consider the many passengers you may impact on doing this. Would you be happy flying to Tokyo (via San Francisco) from Newark only to misconnect at San Francisco because someone thought it was a great idea to make UA wait for a no show? Every action a pax does has unforeseen consequences that can be felt throughout the travel experience impacting people the pax may never have seen or were aware of.

-James