Was it a good idea to throw an oily rag into the gas furnace?
Oh heavens no! What made you decide to throw something flammable in a furnace?
I wanted to send a message to the people who are mean to me.
That can cause a serious fire to start and injure and kill people, as well as damaging the building. You need to not throw flammable things into furnaces.
That's boring.
Boring is much better than potentially killing someone by throwing an oily rag into a fire. I understand that you're upset because of the way people are treating you, but this is not the way to handle your emotions. Talk to the people who are mean to you and try to settle things that way instead of doing something this dangerous.