You can block someone from your profile page or the page showing all your followers.
By taking this action, this means you and that person cannot interact with each other through any of the community features we have (Groups, Chapter Comments, Wall, Reviews).
You'll be able to see a list of everyone you have blocked by either going to your settings page on the website.
If you want to unblock someone, you can also do that from your profile page or the page showing all your followers.