PayPal Will come looking for their money, and will attempt a withdrawal of your account, even if you close both your PayPal account and Bank account after your transaction. This could go against you as a negative on your credit score if you provided them with an actual Social Security number (which was not wise if you did.) PayPal can take the money from your bank account because you authorized them to do so when you agreed to their rules. However, you have the ability to go to the bank, and claim that transaction as "ACT Not Authorized" and there is nothing PayPal can do because PayPal is not a bank. Just a transaction service.
Hope this helped