I've noticed quite a few posts on here about blocking ALL family sharing connections. I coded into sourcebans instead to check if the owner is banned, then block, else allow. This helps playercount, yet still ensures that who you want to ban is banned. It also has coded in to ban the "owner" of the game as well (to prevent the scenario of banning an alternate account, then them making a new alt. account, and it would only check if the new alternate and the owner is banned). However, I am still waiting to hear back on a post of mine before I post it here for public use.
https://forums.alliedmods.net/showthread.php?p=2139387
EDIT: Plugin is now posted
>>>here<<<