Protection against multiple submits on contributions page - when JavaScript is NOT enabled

If JavaScript is not enabled (and from the number of times we run into this issue on a large instance) that still happens more than one may think - then clicking the Make Contribution button results in multiple charges on a person's credit card (4 x $50 in our most recent real-life scenario - all with the same invoice ID) - and 1 contribution $50 to be recorded in CiviCRM (CiviCRM only records one as the invoice ID is the same). It's not just a reconciliation issue - it's embarrassing to have to refund a donor for processing the transaction 4 times instead of 1. I've been able to reproduce this on Safari/Javascript disabled.