That's a nice bit of question-begging, there. Don't you realize that one of the important questions being discussed here is what rights Sony (or any manufacturer of hardware) actually has, or should have? Neither you nor Sony can create rights by merely asserting that you have them. If you are talking about legal "rights", you may (or may not) be correct, but that is not what most other commenters are talking about, and is not how the unqualified term "rights" is generally used.
I believe that anyone who owns a PS3 has a natural right to alter Sony's proprietary software on that PS3, and I also believe that anyone has a natural right to sample an MC Hammer song for use in a derivative work. I am, therefore, led to the conclusion that certain DMCA restrictions on hacking and the extension of copyright to derivative works are both improper, and should removed from their respective laws.
On the other hand, I do believe that Sony has the right to forbid modded PS3 units from playing on PSN, because PSN is an entity that they own, and they can restrict access in any way that is made quite clear before a user purchases a PS3. That does not mean I necessarily think it is wise for Sony to do this, of course; that is a business decision, not a moral one, and I don't know enough about Sony's business to make any judgment.
By the way, you should write "within its rights", not "within it's rights".
You don't actually believe that, do you? People south of the border may not realize this, but most Canadians are reasonably happy with the medical services they have received all their lives (as are most Americans, as it happens), although small majorities in both countries are dissatisfied with waiting times to see doctors.
Anyway, what does Canada's medical system have to do with the propriety of the AMA's enforcing copyright on CPT codes?