Stop it? UCE/SPAM would not be UCE/SPAM were it not for those who open the messages and subscribe to the product.
Those are the folks who need enlightening.
Now, if someone would just speak to those Koreans who think the World reads and understands Korean.
What's next? UCE/SPAM in Latin? Klingon maybe?
Legislate it? Don't hold your breath. Sanctioning laws do not categorically prevent criminal events from taking place in the first place, so legislation will prove fruitless in the long run.
Police it? Ah, now there's an interesting concept. And folks wanting to know why our legal system is so overburdened now, let alone going International.
In my opinion, we need to think outside the box by attacking the problem at the root...the one who opens and subscribes to the content of the UCE/SPAM.