Yea, um, I wouldn't do that one. Wild Roaches commonly run through pesticides and insecticides, and gutloading won't get rid of all the residue. Not a good idea to feed an insect that feasts on filth and walks through unknown poisons and substances.
well living in Florida and living amongst the creepy Palmettos(they fly eek) I can tell you they eat garbage and whatever the can scrounge. I would not feed them no way unless they were caught far away from civilization.