I found a spider spawner yesterday and made a tunnel leading to it just now, and want to turn it into a mob farm. However, I'm wondering if that might fall into one of those categories and I really don't want to get banned for doing something like that not knowing that it fell into the category of lag machine/duper.

Just need some clarification, thanks! -lineaway8 (aka bus6066)

Thanks for the update. I'll be sure to add a switch.