Many roughfish are not easy fish for and they are not targeted by anglers. They do need be managed just like gamefish. Bullheads, suckers, drums and gars can easily over run some lakes and in some cases we have to come and remove them out of the lake to just reduce their numbers and also complaints. I've do lot of carp/pest fish removal few years ago. Common carps can be bad and problematic as Asian carps in many lakes/rivers.