I was just in a trade, and I had items showing while VMK was closing. The other person clicked "accept" even though I was just displaying my stuff. Then, the box appeared that says, "the other person has not offered anything, so you will basically be giving these items away", or something like that. For those of you who pass items between multiple accounts, you will recognize this message. You should also recognize that it only appears when YOU click "accept" while the other person has nothing showing in the trade.
My dilemma is that I did NOT accept, yet I still got this message. Is there a bug that allows a one-sided trade-acceptance at VMK closing? If so, I just lost some good stuff, and it IS possible to steal others' things. I will check first thing tomorrow morning to ensure that I have not been cheated, and I will let you all know what I find.