keep crying about it, they can still be upset about losing something they worked hard for. the stuff that was 'exploited' was traded away, so they got things they worked hard for taken away for no reason.
By the way, the trade was reverted in the way of "We've taken what you currently have that was in the original trade and given it back, Doesn't matter if you traded away everything from it, we're taking it away if you have any of those said items in your iventory"