I'm thinking of installing solar panels that reflect into my neighbors house
What's the reason behind your thoughts?
I think it will really screw with them.
You should not want to mess with your neighbor like this. There is no reason to do this and you could be arrested for it.
What a bunch of people, I don't give two shits about them.
You do not have to like your neighbor, but to actively harm them is wrong. You never know when you will need their help, if you are mean they will not help you.