You get them all over. If it is "free" it will be abused. Make them pay for the screen and case, and suddenly they realise that that "free" phone costs a lot of money. One of the reasons that there is a push to make the upfront cost a full disclosure.
Think in vehicle finance, where here now the adverts are forced to disclose all the costs, from initial purchase price, cost of finance, cost of the residual ( no way you are going to pay off a $20 000 vehicle at $200 per month in 60 months at any interest rate, the balloon payment is often 80% of the value, and the vehicle might not be worth even half that value in 5 years in most cases) in all cases.
Kind of covers the dealers and the buyers as they cannot say that it was not disclosed. At work the supplied kettle and stuff is always abused and broken, as it is "somebody else’s problem" ( mine as I have to fill in the paperwork), and then you get to the "keyboard not working, no I did not spill water in it" with the keyboard still dripping water out the bottom.