Don't be hard on yourself. These types of suggestions are partially why we have the Parliament. (Correct me if i'm wrong).
Also because this has up and downsides for the economy:
For instance, it's good because people can move them, obviously. And it makes farms easier to build.
And people can sell them to each other.
But if you save up and get tons of them, you will have a op mob farm. (Which might get laggy).
Although all of this stuff is from point of view.
If we get this plugin, I vote for controlling the spawners to be off, instead you only have the spawner type you break.