In my opinion deleting from friends/facebook & allow power support is enough.
Also doing the same with anyone who refuse to delete such person.
I also think that every league should like three respected persons as judges to identify & decide if there was a breach.

And how can a person unintentionally break the rules ?
Should we have a rule about biding wars between us ?
I mean it worked smoothly & in a mature way in the current league with players backing off other's target but shall we make it a rule allowing players to call on players in thread & others should simply make ways ?