How about creating a new building to store already-trained troops in camps for future use. I.e., trained dragons in camp, temporarily store them, ad train troops for farming. Then you can "withdraw" these back-up troops and transfer them back to your camps.
So what's wrong with farming with queued troops? What kind of "abuse" can they further do? If you go farming isnt that abusing the other players? But isn't that the gamr? Sorry I may be naive and cant think of abusive things