This guy was buying a large number of Feathercoins for BTC/LTC. Over a couple of days back and forth, he said he's ready, but will only receive first.

Good thing I broke up the substantial transaction into 4 pieces, since as soon as I sent the first piece, he dropped off and never responded.

I reported to the admins, and requested IP information, but no response so far.

Beware of large buy offers and the buyer requesting to receive first. You as the seller should receive first, just like at the store.

His address is 6jWBqhw1YjLGxFmazrASzaoXhkyEckUB59 and I've found a few LTC addresses for him:
LX8gtUiBYDgvpzmF3zG2pvGAVLJLvtExEN and LgyWkwxVWZ8iBGxWre5n4PssE8sXdfTwDg