I wonder how the community reconciles so many posters being up in arms about this event while frequently promoting stories from torrent freak and generally dismissing the belief that much harm comes from copyright infringement. Is it different when someone you know or respect is the injured party?
I think people find it more offensive if 1) you take credit for the work and 2) you make money by using it. But you're right, there must be some internal mental model that allows them to be so obviously different.
Yes, precisely. One case is copyright infringement for personal use, one is copyright infringement and misattribution for commercial use. Compare e.g. Bob downloading "The Dark Knight" to watch it versus Bob selling copies of "The Dark Bob, by Bob" which is actually just TDK with a different label slapped on it. I think a lot of people would find the latter to be much more wrong.
Whilst 37signals does use this bit of creative IP to generate revenue, the page itself isn't actually the product - so copying it creates neither a reduced demand for the page itself or 37signals' services, nor does it impact their bottom-line in any obvious way (curebit and 37signals aren't in the same product-space).
Although the page itself is defensible IP for 37signals, the chances of them taking legal action on it (see above) is so remotely slim that it puts this whole thing into the realm of creative and professional courtesy rather than copyright infringement.
It's more like a stranger coming into the town saloon, getting drunk, and spilling his beer on the local bad-ass.