I'm going to ignore my friend who has been ignoring me.
What do you hope to gain from ignoring him?
I don't know, I just feel sad about his treatment to me.
It's understandable that your friend has been hurting your feelings by ignoring you. Sometimes people go through things that they don't want to talk about. Instead of getting back at him, you should talk to him about how his ignoring makes you feel because there's a chance he has no idea how he is affecting you.
I know it's better to talk but I'm doing this on purpose. More people should ignore me.
Trust me, double ignoring is a bad idea. It's always better to make amends rather than try to take revenge. Why fill your soul with negativity when you can just be the bigger person? People will take notice and take your side.