In good Ole New Zealand most airlines are now banning men to sit next to unaccompanied children on their planes. What do they think those men will get up to on a full plane? Groom them as their internet counterparts? Which wouldn't be a bad idea since there is another nits epidemic going round and their parents obviously don't care.
Personally I'm delighted not to have to sit next to a horrible, smelly, rowdy, hyperactive brat, so only for that reason I welcome the airline policy. Children should be seated as far away from adults as possible. Preferably gagged and/or drugged for the duration of the flight.