So far all I know is that in your opinion, in one specific instance Dwolla behaved in a manner that you believe was worse than how Visa/Mastercard would have behaved.
Every company has the occasional unsatisfied customer.
Can't be worse than PayPal. Depositing 2k, then spending none of it and withdrawing it 2 months later might be odd. Either way, sending a photocopy of your ID is not unreasonable.
It's very unreasonable since they deposited the money and had zero transactions. Dwolla got the money from their bank account, and my parents wanted to send it back to the same account.
It's even more unreasonable since they gave no notice that there was a hold on the withdrawal.