People will watch something that has been highly negatively commented on because they are curious and want to see it for themselves, not because they are retarded as you put it.
And really anyone's negative opinon on something should not be the reason for me to share it especially if a hadn't seen it for myself and had a chance to form my own opinion about it.
I commented it here, because I don't think it's fer on Res and here thread for this to continue there.