It will be more or less impossible to prove or disprove that anyone obtained some crucial information from there. The info will always somehow make it's way into the places it's needed eventually.
If you review the content and publish say a blog post, even without legal repercussions it can impact your ability to be hired in the future since everything you do from that point can be tainted.
So if you do look you should keep it quite or publish it under a pen name that you can’t ever take credit for.
Someone reads the code, mentions it to a friend, who adds it to a blog post, which gets cited in a wiki, which gets read by a developer unaware of the source. If the information is useful, it will end up getting spread.
Also, I would assume other processor companies hire people from other processor companies and everyone all wants the best, most of the basic knowledge would have already made it's way to AMD and other companies.
If you work in a completely unrelated field then you don’t need to care as much.