[DustyPorViva]

Age can make a hell of a difference. It's not a way a sure fire way to determine something, but it isn't something to believe may not need to be provided. Location=timezone, simply. Some servers may like to regulate their staff and make sure the staff are balanced for different timezones or have everyone working at the same timezone.
Also, I say paranoid because your statement about security. There's no risk in you posting your age/location, what kind of security risks do you think that will cause to arise?