Someone has to make the mistake of playing the blame game for it to actually be a thing , and we would recognize that, so more or less we will have a greater insight to a persons intentions when they do play the blame game. For me its more of a red flag, keeps me aware so i dont fall victim to bandwagonism. Without evil, how would we be able to determine what is good* , its inevitable and neccessary so that we dont become soft or docile to dangers. not sure if i clarified it.