Meh, don't need them to end an infestation. Just killing the few roaches that might exist somewhere around is enough to pay their rent.
If I find one close to my face on the other hand, the place it considered territory would be wiped off the map. It would become an endangered species.
(18) I have some dictionaries and listened to music on a CD (because some of my devices had the ability so I had to try it).