Whose mansions are you talking about? Just protesting at some random Sociopathic Oligarch’s palace isn’t going to do anything, they’ll never even see it. These people configure their lives so they never have to be touched by real life. They’ll just spend the day on their yacht or at a different palace. If they are in town, they’ll just chopper in/out at the residence, which will be behind walls and gates a quarter mile away.

Nope, flood the streets in every major city, disrupt everything, block Federal buildings, be as inconvenient as possible. That’s far more effective.

If you want to piss off a Sociopathic Oligarch, then protest at their place of business. Block their entrances, interrupt the flow of business, make it difficult to do business, inconvenience their employees, irritate their neighbors, embarrass them to their neighbors, etc.