When not to call someone out in public
I remember an incident that happened just a few days ago. I was at play practice, looking at a certain board. My brother and his friends were looking at it, talking about their class’s ranking. I started to talk about my own class, when he said, in a mean, insulting tone, “We’re not talking about you! Ha-ha!”  I was angry and insulted, and I’m still mad at him for it.
It just comes to show that sometimes, it’s best not to call someone out on something. Especially in public.  Here are some examples where you shouldn’t do what Sean did.

Your friend has toilet paper on her shoe.
Don’t say anything, and certainly don’t make fun of her. Try to ignore it. She’ll realize soon enough. If you absolutely can’t stand it, rub your shoe and see if she gets the message.
Your friend just accidentally said something really bad.
Don’t say a word! Instead, bring her aside later, calmly explain the situation, and help her apologize.
Your sister is hanging out with you and your friend, and she keeps trying to be an attention hog.
Ugh. Try to get into the conversation. If you can’t, calmly say, “Alright, who wants to do something?”
Your brother just called you a mean name in front of his friends.
That is not something you should get into now. Tell an adult, get away from him, and deal with it later.
Your mom is being an anti-sugar freak, and it’s ruining your fun with your friends.
Calmly say, “Sorry, my mom has an anti-sugar reputation. Maybe she was attacked by the sugar monster when she was little.” That’s her cue to stop being so uptight.
Someone you (kind of) know is doing something they shouldn’t be.
I know from experience that whoever you want to correct is going to be mad and offended. Mind your own business. If the person chooses to get in trouble, that’s their choice. Calling them out on it eliminates any small chance of them stopping.
Someone spells something wrong (and it’s not a spelling test studying.)
Don’t say anything. You can try to hint about it, but mainly you should just let it go unless it’s relevant to what’s going on.
Someone is thanking you for something in an unintentionally funny way.
Try really hard not to laugh. This person is being nice. This is the worst possible moment to hurt their feelings.
Someone you’re with is being nosy towards someone else.
Unless it concerns you, stay out. If it does, try to change the subject.
Someone you’re with is being rude to someone else.
Again, try to stay out. If it’s directed towards you, calmly give reasons why the things making that person rude are happening.
Someone you’re with keeps discussing negative topics, namely, complaining.
You know what to do.
Someone is trying to present their beliefs (which you don’t agree with) as pure fact.
Say, “I disagree”, then change the subject.

Obviously, there are times when you should call someone out- say, if they accidentally order the wrong thing at a restaurant.  But unless it’s that significant, don’t say anything in public. And try not to say anything at all. The bottom line of this entire article is- sometimes you need to let your correction impulses take a backseat if it means not ruining someone’s good time.