Well, at least it's a good scam. It's not Dear Loved, send me money and you can have a bigger (insert explicative here) in just 4 days, while making money from you couch drinking coffee answering emails and, oh, btw you won the lottery in a country that doesn't even exist.
In a way, it's kind of a good thing. Keeps the rest of us on our toes. Let's us know that we always have to keep the sharp, watchful eye and use our brains. Nobody and no program is going to do it for us (especially by checking our paper mail. - but I'm sure somebody will come out with one of those programs now that I've said this. Scan your mail through a scanner and or the camera of your smart phone to look for these key words). But then again, most of us are computer geeks, and that's what we like to do.
So, while it is annoying and juvenile, it does make sure that our brain cells aren't completely wasted on all that pr0n. ;)
Of course, that's just my opinion. I could be wrong.