I'm going to harass someone I don't like
I'm curious as to what ways you're going to harass them?
I'm going to text him so he feels like dying
It's wrong to harass someone just because you don't like them. Texting them until they want to die is cruel. If they did something to themselves you could be held responsible for pushing them that far.
He deserves it.
They don't deserve it, because very few people in life actually deserve any level of harassment and this seems a bit wrong to me. How would you like to be harassed just because someone finds you annoying?