Just a personal incident. They took the cash out of a connected bank account following the classic "I didn't receive the delivery" scam dispute where I was the seller.
Buyer gets the delivery, then claims they didn't. It's then buyers word against sellers (this was before the new system of protection for sellers if they post to the Paypal registered address).
They then claim non-delivery. Next thing I know I'm out $300.
How do you know they got it? Did you send it in a way that they had to sign for it? If so, would not serve as proof of delivery to prevent the chargeback? And if not, how do you know that the customer is not telling the truth?
The delivery came with a signature. They claimed it was not theirs. They also had it delivered to what turned out to be a disused building, beside a car park, in a ghetto.
I wrote it off as a lesson and closed my Paypal account that day.