> Is facebook trying to get access to namecheap's user info on the grounds that it might help them get trademark infringers?
Apparently. At least that's the impression I got.
> Why does facebook think this will help them?
I don't know. The article explicitly goes into how whatever data NameCheap has is not necessary to enforce a trademark action.
> Are the trademark infringers really just phishers publishing fake "facebook" sites that look like facebook but aren't?
It doesn't say. Who knows? Who cares? The point is that NameCheap is not giving up the data unless legally compelled to do so by a court, and a demand letter from a FB lawyer doesn't cut it.