How can the banks be so short-sighted? Soon a lot of people will hear that Zelle is not secure and they will avoid using it.
They could probably use some kind of reputation system to warn that a transaction may be fraudulent... But let's get real for a minute. You need to take some responsibility when you're making a purchase to make sure that the other party is going to come through. When it comes to concert tickets, doesn't Ticketmaster already offer services to allow people to transact in tickets?
Edit: One thing the banks could do, is differentiate between a person-to-person transfer, and a merchant requesting payment. There could be some kind of fraud restitution system when the payment is sent via a Merchant's request for payment. If someone asks you to send money without the normal merchant system then you know that it could be a scam. The banks could always warn that the person to person payment system is like putting cash in an envelope and cannot be refunded if there is fraud.
It’s actually even faster than instant deposit on Venmo because the funds appear to settle instantly (not just transferred instantly)