"Do you, my friend, pass judgement on others? You have no excuse at all, whoever you are. For when you judge others and then do the same things which they do, you condemn yourself."

(Romans 2.1 GNB)

There are many areas in daily life where I get indignant when others do something I consider they are "not supposed to do". But I am not a judge and not a law enforcer either. And if I think carefully, I am not harmed either in those situations. I ought to refrain from thinking that I am their judge.

See:
Judging others
A place for the hypocrites
Hindrance to prayer