Screen name question

[Shin-Ra]

Sony should add a manual option like iTunes' where you can deauthorise all authorised machines once a year or more incase you forget to deauthorise a machine before giving it away etc.

It'd also be a good way of deterring people from 'sharing' paid-downloads as there's always the risk that someone will deauthorise all other machines. I suppose there's already a lot of risks in sharing an account so maybe it wouldn't make that much difference.