Several months ago I asked about what was involved in synching two iPads owned by different people to the same system (https://discussions.apple.com/message/13007157#13007157) and got very helpful and reassuring answers.
Well, it worked like a charm. My new iPad2 is set up just like my old iPad, I wiped my old iPad, initialized it in iTunes as a new device (not a clone of the previous backup) and renamed it to give to my housemate. iTunes seems quite happy with this-- it sees "Ctein's iPad" and "Paula's iPad' as separate devices when we plug them in.
What's puzzling me is that it doesn't automatically maintain separate and isolated lists of apps for the two of us. iTunes wants to take all the apps in my iPad library and migrate it to Paula's iPad. I created a separate library for Paula's machine, so "all" we have to do is remember to hit Option when we launch iTunes and pull up the right library. I've also turned off automatic synch, just in case one of us forgets to hit Option when we launch. It's a bit less seamless, but should work well enough.
It seems to me, though, that there ought to be an automatic way to prevent comingling and to segregate our 'Pads' contents, that doesn't require manual control of separate libraries. Am I missing something obvious? (No, separate login accounts are not feasible-- we use the same computer at the same time or swap off very frequently.)
Isn't this a huge security hole in DRM? I mean, what's to prevent very bad things like someone from plugging all their friends' iPads into their machine and giving them free copies of all the apps they paid for?
pax / Ctein
Basically, the library list that iTunes throws up is everything it's got stored in that library
but that doesn't mean all the content is available/accessable to every device. IOW, the permissions are distinct from file visibility. Have I got that right?
Yes, the permissions are distinct from the file visibility.
However, you can see everything in iTunes (if it was added to iTunes), even if your computer is not authorized for that iTunes account but you cannot do anything with it if your computer is not authorized.
Only items from accounts that are authorized on your computer will be able to sync to the iDevices.
Two people use the same iTunes library.
Each has their own iTunes account for purchases.
The iTunes library contains everything for both users (because there is really only one user. There is nothing to differentiate them)
Each loads what they want onto their own iDevice(s).
If one person deauthorizes the computer for their iTunes account, the apps purchased on that account will not copy to any iDevice, but will still be visible in iTunes.
Each user can select only what they want to sync and keep the devices different that way.
If users want to use some/most/all of the same content, then use the same iTunes library. Just select what each wants.
If users want little/no content the same, use a different library. It's far easier as the other won't have to sort through a lot of stuff they don't care about.
Syncing contacts, calendars, photos and other data can only be done with the user account which is logged into the computer.
If you care about separate info, then the only way is to use separate computer logins (as I suggested above)
(sorry. A bit long winded)