Remote password change via icloud?

(I don't know any other categories to put this under… ) How does this work? I want to remotely re-lock my ipod since the person who has it, knew my old password but doesn't realize my icloud still works on it. When I do this, he has no internet at home so does the phone have to be unlocked and connected to wi-fi for the password change to work? Or can him just being somewhere there's wi-fi, make it ping the iphone? I'm confused about this aspect of it. Like say they didn't know the password but it was easy to guess(1234) so you wanted to ping a new password to it that is less easy to guess(9022), would it only ping it if the iphone was unlocked or will the wi-fi connect without the phone being unlocked first as long as the phone was at a wi-fi connection that was saved? If this is too confusing I'm willing to e-mail instead.

Not necessarily. The Cloud is a pretty interesting framework -- although the phone doesn't HAVE to be connected to the internet right now, as soon as it does, and iCloud syncs, so will your settings. So unless the devices connects to the internet the settings will stay the same and they will maintain their current level of access.

However unfortunately for you the remote password reset via iCloud has been temporarily disabled until security holes can be patched by Apple. So for the time-being this is impossible to accomplish.