Weekly contests / Friends list

In the weekly contests I see “friends profiles” which is neither in my facebook list nor the game friend lists.

These “friends” has no name under the photo and their progress and leveling up is so fast that it’s impossible for a regular user to achieve.

I’m afraid that these accounts are booted or hacked.

I need your help.

I don’t want to see any profile which is not in my facebook friends lists in the game.

I’m afraid my privacy is violated.