This happened to me just the other night. I was going for a 4 story building and 2 other Toons (one with about the same amount of laff points as I do and one with considerably more laff points) joined me. I caught on quickly that they were friends and helping each other when one kept tooning the other up and let me go sad. Okay, granted I'm not a super experienced player, so I rely on some help once in a while, but to make someone deliberatly go sad is just... well, SAD! It especially was disheartening when I tooned them up at one point early on in the battle and we were on the last story of the building. I also got the "You stink!" message from one of them...
Sorry this happened to you Big Coconut.
I have run into a lot of very nice, helpful Toons, which I very much appreciate and help out whenever I can. I'd be happy to help anyone if you need it and you run into me in the game.