[KatrKat]

When PayPal goes to make the withdrawal, the bank doesn't have to let them and give the account a negative balance. Usually you can turn off overdraft and withdrawals will bounce if the funds aren't there.

This doesn't stop PayPal from reversing a previous inbound transfer they decide shouldn't have happened, but it ought to stop PayPal unilaterally deciding they would like some of your money.

[dotancohen]

So why not turn off overdraft from one's main bank account?