1. Switzerland is not part of the EEA, they have their own agreements with EU.
2. It is quite possible to opt out of EU regulations while part of the EEA. But the Norwegian government do not have the balls to do so.
3. Norway had an older agreement with Denmark and Sweden about passport-free travel. It was not Shengen compatible. So either Norway had to join Shengen, or Norwegians had to get used to getting passports to visit said nations.
2. It is quite possible to opt out of EU regulations while part of the EEA. But the Norwegian government do not have the balls to do so.
3. Norway had an older agreement with Denmark and Sweden about passport-free travel. It was not Shengen compatible. So either Norway had to join Shengen, or Norwegians had to get used to getting passports to visit said nations.