I don’t remember where, but I’ve read they’re funded by oil companies. I think it’s actually surprisingly effective, because generating outrage is the point of demonstrations like this. Also, iirc, all their targets so far have been behind protective barriers, so no real damage either. Should they be inconveniencing oil execs? Sure! (I’d honestly prefer if they [comment cannot legally be completed], but that’s probably asking too much.) But their current strategy gets more attention, and more attention gets better awareness. No one cares about a rich asshole. Everyone cares about world-famous art.
Go to the breaker box and pull the big one labeled “main”. Then call the fire department.