Tho sharing an apple id is against the terms and conditions of the account.... It's not made to be shared.
Can you point out where it says that (honest question - our family is using the same ID for our purchases because I couldn't find anything saying it wasn't permitted)?
I've read through my EULA:
http://www.apple.com/legal/itunes/ca/terms.html
And can't find anywhere that prohibits sharing an apple id. Closest reference I found appears to implicitly allow it, since the only way to download an app is to log into the App store with my id:
(i) If you are an individual acting in your personal capacity, you may download and use an application from the Mac App Store ("Mac App Store Product") for personal, non-commercial use on any Apple-branded products running Mac OS X (Mac Computer) that you own or control.