Do you though? Part of the definition of ownership is the ability to exercise control over something. For desktop OSes there is always a way to edit that file. The only problem is a lack of knowledge on your part.

For mobile devices, however, it may actually be impossible. Even if there is a technical solution, you may be contracturally prohibited. Whether or not you own you phone is not a question that is not easy to answer. Pesronally, I use the stupid things as little as possible.