Earlier quoted context omitted.
Are you a lawyer? Because it doesn't look like users are actually required to hold PayPal harmless in the event of property loss due to bad counterfeit decisions.
Are you a lawyer? You appear to believe that a signed contract is inviolate. I am not a lawyer either, but I've dealt with contracts enough to know that the clause in this contract has "reasonable" in it for a reason, and that "reasonable" does not mean "whatever we think is reasonable".
So there's that.