Sure, but for this to be an easy case to prosecute, it helps if there's documentation of that revocation (as a personal example: I've known plenty of family members and acquaintances who maintained accounts with ex-spouses, especially for things like childcare and other responsibilities that don't exactly go away just because a relationship went sour).
Also, if one does want to make sure a previously-authorized individual can no longer access something, the responsible thing is to change the locks ASAP, thus revoking that implicit authorization.
This is true, courts always measure motive and balance the actions with how divergent it was from how a reasonable person would act.
There's plenty of reasonable reasons for her to have access. Especially if she had access to the account previously in a shared role and only read the information instead of modified it somehow. But that of course depends on whether the individual made it clear it was now off limits because (for example) it is now a strictly personal account again or the divorce was finalized and there was zero financial connection which exists between them.
Plus things like how reasonable it would be to not say anything about it but expecting them to know better. Which is why the exact details of the arrangement needs to be clear.
Sure, IANAL and don't know the legality of handing out my password to people because I've never had the need to do so. But I take it that you agree the "unlocked window" analogy is not a good one.
No, I don't agree. I might give my neighbour a key for emergencies, for example. That does not imply that they have permission to enter whenver they want for whatever reason they want.
