[derefr]

No, of course, it's not like Craigslist has done some damage to PadMapper and now needs to buy them as recompense or anything. But buying them would be the... gallant thing to do?

That is, it isn't so much what Craigslist "needs" to do to be in the right, here, but it's what they could do to be in the very right. To be better than any other random classifieds company, to generate viral PR, to be something you'd be happy to say you use, etc.

[flatline3]

I think it would be wrong to reward the PadMapper author's ethically questionable behavior.

[sliverstorm]

Being gallant doesn't make you better than other random classifieds companies. It makes you more gallant. That might be worth something to a few users, but it doesn't seem like the majority care.