Not only are you lazy you don't seem to have a clue about human nature, because I have never created a thread complaining about having loot a ninja on this or any other forum. It is also very difficult for me to lose rolls when I hardly ever roll because I pass about 95% of the time. Either you were too lazy to read the post you quoted or you quoted the wrong post.
To be fair, most people who are complaining about ninjas and losing loot rolls are only thinking of themselves. Since the complaint thread stems from THEM losing a roll on something. The issue isn't fueled by altruism. It's fueled by people thinking of themselves and what they lost a roll on.