I'm not a professional, just a parent. But I personally don't think there is anything wrong with him cutting the eyes out. It is kind of creepy having a poster in your room with someone on it, because sometimes it does look like they are following you. I used to have posters in my room as a teenager and took them down for that very reason. I am surly not a paranoid person. I suggest you talk to your Son about just taking them down.