Pardon me for saying so but you have not understood what I wrote. I did not urge anyone to "say whatever [their] brain produces" or anything equivalent. Nor did I issue a rallying cry against decency. Elevating the level of discourse would be a wonderful thing and if you've got an effective suggestion for how to do so I would be glad to read it.
But saying "be polite you jerk" merely drags things even further down into the muck.