We don't do these things because social etiquette tells us not to, especially that last one. However! As a writer, isn't it awesome to know you can write characters blowing up over the little things? It could be the starting point for your story. Say, a stressed employee blows up at her evil boss and goes off to seek her fortune in the crazy world of Internet meme creation.
|Best. Meme. EVER.|
My old writing tutor told us all to forget about social niceties, no matter what genre we were writing. Even in a contemporary story, no one picks up a book and wants to read about Nicey McNicerton from Nicetown where happiness and contentedness remain unspoilt for eternity and nothing ever happens.
Characters need to get angry and do stupid things. They need to have moments when everything gets too much for them and the cracks show. They need to panic and turn their backs on the people who need them. They have to fail when they really, really need to succeed. Why? Because that's where the story is. If your main character never does anything bad or never shows any weakness, they may come across as boring.
Think about some of the big twists in your story. Do they happen because of a character's weakness? Does your character show weakness? Is there a moment when your character's self-esteem takes a knock because of their own stupidity? Think about yourself and some of the silly things you've done. They're as much a part of your make-up as all the positive aspects of your personality. Make sure your characters have some negative traits to balance all their shiny goodness.
In other words, channel all your negativity into your character. Let them have the public meltdown you can't. It'll be very cathartic, and could make for an engaging read!