I really think their bans are happening because of reports by other players. Because I've been doing less common botting areas for a long time now with no bans. Obviously if you do common botting areas like chins or yews you will get reported a lot especially if you're a level 3 that's not talking.
I can't picture being in your shoes. I wouldn't be stupid enough to let a random stranger that I don't know well enough onto my account, and if you did know him well then I suggest getting new friends.