Anyone d/cing? ...A lot?

Not to spread rumors or anything, but some servers seem to be unstable for some reason, and it seems some people are able to duplicate items by selling them in a shop (they buy on another account or a friend buys) and they buyer logs off, the seller DCs, and then theres a small roll back and both people have the items. At least thats what ive HEARD. And its only affecting certain worlds.

The same goes to scania. Some of the so called "Legit" comunity of scania have been doing this too. I don't know how exactly though. I heard they had to use D/C hacks for it, but not idea why or how.