My roommates keep dying because I won't allow them access to my kitchen

I'm at university now and have a problem. I need your opinions.

Every single day last week there was a fire in the community kitchen. I don't want to pay for the new stoves all the time because my roommates won't contribute to the costs. I have a sweet little kitchen in my own room. It's mine and I bought it all by myself. I don't want my roommates to use it because I don't want my room to be on fire. So I close the door and I take the key with me when I leave the house. My roommates aren't happy with the situation and complain alle day and night because they can't access my room. They even leave the unfinished food in front of my door. Few days ago a roommate died because of hunger and today it happened again!

Now my question: Am I the asshole for not letting them cook in my room? I mean, they don't have to die, they can order pizza, use the microwave or eat in the cafeteria.