I will be glad to see something happen on this front; my telephone has gone very quiet since the "Don't call" list went into effect. I had figured THAT was a lost cause, too, but it's proving me wrong!
I've used the "rules" in mail, to delete most of my email junk, but the spammers keep finding ways around it, and I almost always get 1 or 2 pieces of spam a day. It's really not a big deal, but then, I'm not paying/getting paid for my time on the web! If I was a business, I guess I'd be bummed!