I don't personally see it as unfair as everyone has the opportunity to do it , not much different to having friends in the same league imho....
I have 2 accounts (one is for the FB page I run and one for my personal FB) and on one account I have been in the same league as my bf a few times and on the other account I have been in the same CL/Cup/League as my bf's other account and one of our friends....that dude might not have intentionally tried to get both teams in the same league etc... not nice to call people cheaters and say they should be banned when they aren't really doing anything wrong. You're only level 1 so don't worry about it.

Oh and just wondered how he can climb higher by cheating o.0 ?