Hanlon's razor is a special case of this general rule. It state that "you should never attribute to malice that which is adequately explained by stupidity." I think that's a good principle to follow in everyday life, whether in politics, interpersonal relationships, or the world of work. For example, recently a Tennessee legislator, Rep. Andy Holt (R - Dresden) said that he would give away an AR - 15 at his fundraiser on June 25th. Note to Bilbo: A possible nominee for Left Cheek Ass Clown for June.
The fact is, there's a lot of stupidity around. I don't have to enumerate examples; you can come up with a slew of them yourself. And it's true; whether the action that results in trouble is due to malice or stupidity, the result is often the same.
So, for your own peace of mind, say, "Bless her or his heart, and just assume that the offender is just a few bricks shy of a load! Chances are, you're as right as rain on a tin roof without getting your panties in a bunch. Self-inflicted wedgies are no fun!
I'm not doing a Battle of the Bands today; however, I should have one by July 15!