i recently (before this feedback tracker exist) start a new topic in the official Arma 3 Forum about an exploit in Arma3. I found a bug in Arma 3 and it is possible to exploit this bug on nearly every Server which supports to sell the content of a car (https://forums.bistudio.com/topic/190914-arma-3-car-exploit/) - so nearly every sandbox gamemode. E.g. Wasteland, Altis Life, Exile and much more. You can use every kind of backpack and every kind of car - it doesn't matter.
If you need any further information, feel free to contact me.