Cypher8 The only thing I can think of is that Google Play hasn't made the newest version available in the one profile for the one account? This would probably only apply if you are using different Google accounts.
If you have Facebook installed in the owner profile, you can "push" it to other profiles in the profile settings.
grayway2 just delete your account.
I'd imagine many people agree with you, but keep in mind that people may have their own reasons for installing and using apps/services like Facebook. For all we know, they need multiple profiles and accounts for business reasons, or some other "valid" reason that you may not have thought of. It's not our place to decide for others whether they should or shouldn't use certain apps or services.