I'm going to cut off friends after someone spit on me
Is this why you are cutting them off?
No but that's part of it.
I think if these people spit on you, they are not really your friends. It's important to take yourself out of a negative situation before things escalate to something worse.
Nah. I'm thirsty for revenge and I'm going to piss on them.
Revenge is never the way to go and I am sure you will regret it. Try solving your problems by talking about them.