Anyone who donated through the website had to see the ticker that displayed a running total of how much money had been collected at any given point during the time they were taking donations. It was very clear that the original intention as to collect $5,000 to send her on a vacation, and that goal was reached very early on, yet obviously people kept contributing. Now, we don't know if the people who contributed are the same ones who are criticizing her use of the money now, but if that's the case, I think they're way out of line since they had to know that the goal had been long passed, yet still contributed.
As for uploading it to Youtube, well, I don't know if I'd call it "rude," necessarily. Possibly insomuch as it may have been embarrassing to Karen Klein. As for the bullies, I have a very difficult time sympathizing with any of them.