I have often wondered the same...why cannot they either offer free wifi or have a very simple password..alá BA for example..but there are far more annoying ways to do it as well...for example the "OSL Lounge" (naturally at OSL) has these vouchers valid for 60min with complex passwords etc..if you're there for let's say 75mins you need to get another voucher from the desk..at least the AY access is for 2hrs on one go, which is enough for most pax, I'd imagine..