When I was researching my new pack a few years ago, I came across a company in the US that did custom packs made here. Can't recall the name, but I remember folks on here told me to stay away from them.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .