Is it right to steal my roommates food?
Why do you want to do that?
I'm too lazy to go buy my own food.
It's not okay to steal stuff that belongs to your roommate. You're creating a toxic living situation for your roommates by stealing from them, it isn't right. Your roommates won't want to live with you if you behave this way.
Please. I'm going to take their fucking food.
Then you should expect consequences for that. Your roommate will find out and they will become very angry at you.