It depends... professional MLB players, "heel" wrestlers and the like are paid good money to be publicly criticized. Then there's people like my aunt, who just

It depends... professional MLB players, "heel" wrestlers and the like are paid good money to be publicly criticized. Then there's people like my aunt, who just has no filter. Examples there are her talking to my sister "your children are just too fat". That went down well but was just having no filter or foresight and not overt malice. But for regular people, you should never criticize unless it's something particularly selfish or thoughtless.