Well it's kinda understandable, although lamentable, since open-source development requires high morale/passion if there's no monetary incentives. If someone f

Well it's kinda understandable, although lamentable, since open-source development requires high morale/passion if there's no monetary incentives. If someone fixes your car for free, but afterward you complain about them scuffing the upholstery, they probably lose motivation. I know it's not the same thing, but I think it comes from the same place. There's also the safety-in-numbers aspect, similar to editor wars, where people adopt the attitude that the more people that use their thing, the better it will be, so they are waging a propaganda campaign for their cause.