is it wrong for someone to take there bad mood out on someone else?

Only if it is by beating their wife.

^Just joking. That's horrible^

Taking out your anger on another person is NOT OK. Although many people do it. It is not alright. If someone is taking their anger out on you try not to take it to heart. You must always rationalize things and put them into your own perspective. Try thinking about how they are feeling while they are upset and try talking them to make them feel better. Many relationships are broken up every year just from this situation alone. Sorry that this has happened to you but I recommend rising above it and don't take it to heart.

YES, it is. Especially if the other person does not deserve it at all.

Instead of taking your bad mood out on someone you can put it into art, or do something in the meantime to calm down.

Taking a bad mood out on someone makes you a very unlikeable person...

yes

Sometimes it can not be helped---esp. if they have diabetes or a mood disorder.

Yes...

yes?! lol ... i do slip sometimes and i apologize late on :) after i've realized that it was stupid :/ it happens im only human