Human Nature

What is wrong with people? Just because they can insult someone from the safety of their homes, bbs or whatever device they use does not mean that they should!!! Isn't there some kind of etiquette that we used to call respect... I just finished reading the nastiest answers from zillows and other real estate portals... I am absolutely shocked at people's meanness.. Why???  Do they feel better afterwards?? I am puzzled....If people don't have anything positive or enlightening to say they should just MOVE ON and don't bother to reply.