Dealing with people with unimaginable character

Everyday we go out we meet people, in the process, we meet The good, the bad and the Ugly. Yes! The Ugly.
We meet some people and we just feel like strangling them at a spot if we were given an opportunity to. Some people will act so immature and you will be wondering what type of person they are. Some will deliberately provoke you just to get to see your other side. Some people will deliberately take your stuff and they will still be claiming rights on it. Some might even just opened their mouth to say whatever flows from their mind without thinking of the repercussions
" you see some people and you expect more from them but it amazes you when you get the opposite.
The best way to deal with such people is to ignore. Act like you didn't see any display of stupidity, act like no one is around you, like no one actually offended you if not you might act in a way you regret.
Have a standby policy of forgiving some one before they offend you.