Given how so many people have been screwed over by scalpers and prevented from even getting the PS5 to make the claim, I see no problem with someone maybe getting on their friend's PS5 to make a claim. It is anti consumer for Sony to punish anyone that had access to a PS5 one way or another, and made a claim with their legitimate PSN account.
Now people selling the access online and making a profit? That is another story, and they are using Sony's IP to profit for themselves. Sony has every right to go after this group of people.
Are you serious?
It's in the TOS for a reason. Sony is being pro-consumer by allowing people to be able to sign into other people's consoles with their PSN and even sharing games with family. But when that thing gets abused it's a different matter entirely. And that's what these people are doing. And its easy to track, I am sure sony isn't banning EVERYONE that has done this but banning people that did it from PS console that has registered a suspiciously high amount of such transactions. Probably anything above 4/5. That's why they are banning the primary account on the console but only suspending the sub-accounts.