[linkregister]

On the other hand, a false positive does harm you if it makes it more difficult for your email provider to weed out the genuine spam.

(But I think you are only clicking "spam" on the unsolicited or hard-to-unsubscribe stuff, which I support)

[DanBC]

As soon as a company sends me email other than hat I signed up for I report as spam.

Companies need to learn that merely being in possession of my email address doesn't mean they can send me anything they like.

I'd pay money for a modern day SPEWS-like art project.

[linkregister]

There are a number of modern-day services that perform a similar function. Spamhaus is probably the most famous. Looking at the wikipedia entry, it looks like SPEWS failed because their whitelist process was not good (and the DoS attacks).