Earlier quoted context omitted.
I think the problem with this, like with most routes that involve a lawyer, is that this isn't about being enforceable or not, but whether you can actually pay in time and money to try to enforce it. That's why typically only companies try to enforce licenses. The author said that even writing the blog post was hard because he had not much time to spare. Imagine what it would cost if you sue and demand a newspaper li…
if a lawyer gets a percentage then it is hardly any work at all
One of the things money seems to buy, which makes wealthy people/entities able to tackle problems that must of us realistically can't, is time.
I believe that in the end, the so-called rat-race is just a race to be free to have time, to do whatever you like to. Sure, some chains you will never be free of, but if you can shed enough chains off of you, you will have enough time to do other, more meaningful stuff, like defending your rights/intellectual property/privacy, etc.
In this case at least, it seems like the author finds it very hard to pursue this path, because in the end, what's in there for him? Maaaaaybe some money, after a long a emotionally tiring fight. On the other hand, you will lose time and money and potentially your health (since I don't see this route being stress-free).
In the end, like for most things, it ends up being a kind of personal-ROI thing. The return he sees is probably to low to be worth going after it, and the investment and risk too high.
And that's unfortunate, because in the end the abusive guys with money and time end up winning most battles :(