Either you give them a wiped-thoroughly clean account, or, ideally, you would just give them total regulate in excess of the interface, but maintain the condition of the account as whatsoever they had been just looking at, to not have the leaky abstraction of, Ok, the tour-manner things was actually just bogus objects designed in a faux state that we shown to you, but it was in fact a lie, which is how a good deal of them are executed.