I remember once building a nice charity program that would make meals for homeless people. I had deluded myself into thinking I was building some kind of revolution or whatever.
I had a book club where we all read theory, and it basically was just a tacked on addition to the food charity.
It was really stupid, but it also broke my heart when a guy deliberately sabotaged it because I was a tankie. It was set up in a very level way where we all basically took turns being the coordinator. He intentionally did nothing and told everyone that each role for that week (driver, cook, etc) was filled. Then when the day for distribution came he laughed about how it wasn't going to happen.
I had to buy like 10 pizzas that day, and I remember not having internet because those pizzas were my bill money. The group kept functioning for a while until it fizzled out, but not because of him.
Most people of all political leanings were willing to help me with my stupid idea, but not that guy. I think about that a lot.