How do 你 block a person from getting on your 个人资料 and/or wall?

1. Change your 个人资料 settings to allow only the people 你 watch to 评论 on your page.
2. 你 can only block someone from sending 你 收件箱 messages. 你 can do that as well.
3. 报道 him for harassing 你 and let the staff take care of him.

Hope that helps. :)