Automated Return procedure missing one crucial feature

Ebay, please.

The new automated return process is fine.  The automatic FVF refund is cool.

But, give us a way to block bids from buyers who abuse returns.

Any bid which might end up this buyer's 4th return in 6 months, I'd like to block.

I'd like buyer to understand that there is a cost for a return. Even when I pay the return postage.

Thank you.