If you go into an enemy base, you should have the ability to disable generators so that you can stop the opponent from having more of that item. It would require you to "feedback" the stuff(e.g. give the diamond gen like 40 diamonds) and it would be disabled. If that was too overpowered, maybe you could disable the generators this guy talked about in his thread (https://www.cubecraft.net/threads/purchasable-generators-eggwars.180943/#post-757855) and um yeah pretty much.