I'm thinking of quitting my job without warning
Why wouldn't you want to give your boss some warning about quitting?
I just want to be free and I don't like how my boss is always on my case.
Giving notice about quitting your job allows your company time to find a replacement, and not have to disrupt the work of others that are still there. Leaving on good terms can help you find another job a lot faster than if you leave without references.
I'm going to do it anyway. It's not like I care about them.
You might not care about them but you might have a harder time finding a job. You should try to give your boss some warning before you quit. If you are not happy with your job, you should find something else respectfully.