TF2 has recently suffered a plague of some of cheating. Rather than cheating to win matches, players have been cheating to gain in-game items, using “external idling applications”. The drops came at random, so people hung around on specifically designed servers until they’d collected what they were after. (I think.) Valve have announced this Will Not Do, and anyone who has accrued items this way will find they have vanished from their inventory. And this is the their gentle, generous response.