If someone hacked someone elses account and did an account restart (without the owner of the account locking it ofcourse)
Would Dan beable to restore everything lost if the original owner wished it back?
Not that this has happened to me or anyone i know.
Or that i or anyone i know intends to reset someones account.
Just somthing that passed my mind.
^^

Secondly if someone wished to change there facebook account, would it be possible to move the GL account from the old profile to the new one?
Again not that im intending to do anything like this X-D

Resetting your account will COMPLETELY WIPE your character and allow you to start the game from scratch. This process CANNOT BE UNDONE. ALL of your research, missions, modules, artifacts, minerals, structures, and planets will be removed. (quoted from the Account Reset help menu of the game) So to answer the first question, I would say no, if your account gets reset without you knowing it, you will not get your stuff back.

As for the second question, it happened to someone I know, where (for reasons not going to be mentioned) had to start a new FB account and start the game over new. Existing ship stats and information cannot be switched between accounts either, the only thing that Dan will move over is the name of the ship to the new account, but that is only once it has been determined that the original account is indeed inactive.