Too simple solution?
There are apps on line now that link to thousands of web cameras using default settings to broadcast pictures of everything from sea views to children's bedrooms! The average punter is simply too stupid to be expected to change their password and let's be honest there is no incentive to do so - so why don't manufacturers "simply" send out devices with different random passwords preset? If the punter loses their password then too bad - or stick it on a label on the item itself. This could all be dealt with in the terms and conditions of sale. Too simple?