can I stop someone from posting on my wall?

I think blocking an user only stops them from PMing you, not posting on your wall. However, bạn can change your settings so that only people you're a người hâm mộ of, hoặc only yourself, can write on your wall.

Go to your thông tin các nhân and select chỉnh sửa Profile. Scroll to the bottom of the page. You'll find a drop down box. It's set to "anyone" bởi default but bạn can change it to stop people from posting on your wall. Click đệ trình to save your changes.

Yes and no. Blocking someone prevents them from commenting directly on your tường but they can still do it if bạn post on any of the club walls. As I đã đưa ý kiến on my last post--there's no surefire way to block people on this site. It's probably one of the least safe/secure sites I've ever been on in that way.

I'm not sure. I think bạn should just block the user and it will be enough.