The way that these companies use intellectual property law to secure for themselves a property right to something that someone else purchased from them ought to be highly illegal.

I believe there was a supreme Court case I better garage door opener, and the company that made the garage doors was trying to sue because they didn't want anyone using anything but their garage door opener. I could be mistaken, but I'm pretty sure that the supreme Court in that case explicitly stated that the purpose of the dmca is not to provide companies with a property right to something that people have already purchased.

Technology companies just went ahead and did it anyway.