Is it a felony if I kick that thing off the sidewalk ?
Was the Boston Tea Party childish vandalism or heroic patriotism? Only history gets to decide how the actions of disobedience are ultimately judged.
I feel like you can't just leave a washing machine blocking the sidewalk unattended and sue anyone who scratches it while moving it? (IANAL)
If it's moving? You should just wait for it to go obstruct some other part of the sidewalk.