i had the same problem a few years ago so i got a two neighbors who also had high powered bb guns and we went out expecting to get maybe 5 at the most but we eneded up killing 20 in one night... there was a smell but it only lasted a day and didnt get into the houses so for one day of smell it was well worth it... it is illegal but like you said no one will take care of it and sometimes its best and easier to take matters into your own hands