I don't know If this is the abuse you guys are talking about.
But I have done this twice so far I think.
It was a long time ago ( one month ago or a bit less )
I once went to Ocean Docks to get some orders , I've picked up an order with 2k (22 tons) payment and delievered it to the logistisc given and came back to the actual point to pick up another order with 1.5k payment , and once i arrived there i have seen the order i picked up the first time , I saw it on the list , carried it and transmitted it again then logged off.
I have had no idea about this being an abuse , but I haven't abused it more than twice.
(Still don't know if this is the abuse you were talking about)