@Anonymous User
Having six devices set up lets you choose from them which 2 (or 3 with Boost) you would like to watch on at that particular moment, depending, perhaps, on where you are in the house, lounge, kitchen, bedroom or study, say.
Set a Payment PIN on your account so that no-one but you can buy memberships on it.
Check your bank accounts monthly for any other unexpected payments to Now.
That way you can at least nip them in the bud, while you and Now figure out whose fault they are.
