...you do know that in FoD, there is nothing u can do to stop someone from following you or watching ur game, unless they're sending you hate. You can use the mute button if you still dont like that person

So in your case, your only option is to mute guests :)

Good morning " UBR Shonisaurus",

If you feel like you're being spied on or harassed................
Just use the applications made available to everyone.
*Switch guests
*Right click on the nickname then on the no entry sign.
Explanation;

https://app.screencast.com/BlWx3jE05BlWk

Have fun and good game on Flyordie