While the OP certainly has my sympathy, I hate to be the bearer of Ill Tidings...but it's NOT "abuse".
Inno has known about this...tactic...since about the second day their game went live, and they have chosen not to do anything about it. That being the case, one cannot conclude that the....tactic...is anything other than an Inno-approved....tactic.
By all means, take whatever steps you deem necessary to boost your Defending Army. Just don't expect it to be a successful endeavor. Your only real "defense" is to set your productions so as to give you the best chance of being there to collect them rather than an attacking player.