I am not sure what you mean with 'Nigerian prince', but since a lot of e-mail scammers claim to be nigerian princes I will assume you meant that.
The problem isn't that some tiny website somewhere uses fingerprinting, because they can't follow you around the web.
The problem is companies like Google tracking people around the internet. You can fine them if it turns out that they use fingerprinting techniques to track people. Seems pretty straight forward to me.
On a more serious note, do we have any data on how well the "do not call" list worked out?