It was a difficult choice to make in the project. IRL it should be unknown, then help with radio and IFF, controller could affect names and side to contacts.
By the way, I think that it forced to have radio and IFF that is not the case of all LotAtc users, it could discouraged lot of teams...
With UniversRadio developed by Tacno from my team, we can have both (radio+IFF). Once fully integrated into LotAtc (IFF management), I think I will change that and make all contacts unknown and enemy by default. More realistic :) Perhaps, I will add a "ADVANCED REALISTIC" profile for that...