That's a pretty big WTF right there.
I know PayPal has a on overall pretty scummy reputation, but I still I cannot imagine PayPal doing this because they themselves think they'll benefit from this data.
To me this seems like a demand which comes "upstream" from above PayPal, from its payment providers (VISA, MasterCard, American Express, etc). Would I be overly paranoid to imagine these demands and claims are the result of lobbing by entities like RIAA and MPAA? They do have a history for blocking payments to known pirate-friendly services after all.
And as such, they clearly have too much power, and there needs to be some anti-discriminatory financial regulation to stop business-hostile practices like this from being lobbied and put in place.
Because this is just madness.