On the subjects of spam

I love the new spammer strategy of wild subject lines and blocks of prose covered by an image. I get all my personal email on my Sidekick now so I see thru their clever ruse. I laugh every time I feel the "you've got mail" vibrate (the Sidekick is a very flirty device) and pull it out to something like "seasoned semicolon" or "bashful dashboard."

Today, however, I received the best spam subject of all time:

bladder sauce

Just wow...

Why do they do this? I've heard theories that it's an attempt to "untrain" filters that have been learning what spam looks like for about 4 years now. Flood them with nonsense that people mark as spam and suddenly the filters become too confused to work and the spam starts pouring in again.The battle for the tubes rages on...