For the record, I'm not saying I agree with their methods, but I don't think it's fair to them either that everyone is acting like they did irreparable harm to the monument.
“The orange cornflour we used to create an eye-catching spectacle will soon wash away with the rain..."
Just like the Mona Lisa incident - they aren't doing irreparable harm to the monument. It definitely gets the discussion going, which feels like their ultimate goal.