Sure, but most of the time weed enhances your endorphins. It enhances your feelings. So if you are sad and angry before you smoke, you may be after. .

Possibly.
Doubtful if it's cannabis but some strains are so strong they can affect you in other ways, so it's said !

when their pacifier is done , they can be cranky in needing more. They are mostly self possessed in need of more continuously.

I've never witnessed that.

It's possible

yes... seen it. then again those people were jerks before.