I'm thinking of becoming obsessed with a stranger and starting stalking
It is not a good idea to stalk a stranger. Why would you want to do this?
Because he pisses me off drastically. He's always making trouble in my life, I want to get revenge on him for this. He deserves that I stalk him.
It sounds like you know this person, and even though they make you angry it is not okay to stalk them. Not only are you compromising their safety, but you could get into legal trouble. It is better to talk it out with this person.
I don't have any concerns of safety and want to give them a hard time because I want to get back at them.
It's not good for your own mental health to get so much consumed by revenge. Just let it go. As I said earlier, talk to them and sort out your issues.