Securely Lock Down the Followers / Following Functionality

[JimLynchCodes]

I was worried that I wouldn't be able to have only the authorized users editing objects of others users without hackers being able to get in and mess with other users' stuff. However, I asked the question on stack overflow, and some dude gave me a really awesome answer. I still don't fully understand it, but I'm pretty sure it will work!

http://stackoverflow.com/questions/40421271/firebase-security-issues-how-to-have-one-user-change-anothers-db-object/40422166#40422166