Anti-scam implementation for trade
I keep hearing in chat about people losing items/money to scammers who take their offer away at the last minute. So here is a simple enough idea. After both parties involved in a trade check the confirm box, lock the items in trade so they cannot be removed and have a another confirm button appear stating something like 'Are you sure?' or 'Final Confirmation.' A secondary confirmation feature would allow both parties to double check to make sure the trade is legit and fair.
Implemented, see blog for details
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Xio Rheims commented
TL;DR
Trade would require 2 confirmations, a 'confirm items' button, followed by a 'confirm trade' button.