> I use X in a manner which its creators want me to use it.

I still did not understand this kind of often repeated argument, after years and years of reading it. Why _exactly_ should I freely, without any legal and consensual contract, limit my usage of any particular product X (be it a hammer, a car, a song, or a office spreadsheet) in any kind of way its manufacturer wishes after the point of sale?

This must be some kind of moral argument, please explain.