It is a very simple concept. You can do whatever you want to the hardware, the OS is licensed to gamers. Games are also licensed to gamers. This is nothing new, this has been going on for generations. Iirc there ware similar verbiage in the Eula/tos of the previous 2 consoles as well. You agreed to it either by agreeing to the Eula or by use. If you have done neither then you have less of an argument.
Just because you assume ownership of something doesn't mean that it is true. Now if you were to use that info to compeletey wipe the native OS of the machine then that would be your right. The sticky nature of the DMCA and Eula is simply the bypassing of security to do so. The act of bypassing it violates the contract and the DMCA but running another OS is not.
The truth is though, people do not want to lose the abilities given in the native OS so they pretend like they don't understand the distinction between license and owner ship and try to justify using a modified version of the native OS. If you are going to knowingly do something like hack the console (for pirating reason or for hombrew) please man up and admit what you are doing is in the green. It makes sense for Sony to do this. They are probably obligated to do this because of the way their game console generates revenue, their partners involved and the investors they have to answer to.
I just wish this woe is me, I am an innocent abused hacker/hobbiest/tinkerer act. Here is the deal if you use the software, just accept the fact that you not get to use the PSN again.If you are distributing the proprietary sony code/information (that they can identify),expect for them to come after you. it is really that simple and it is justified.