if it costs $0.50 to raise one rat, then the fee for killing one can be $0.05. storing them somewhere, feeding them,etc.. surely costs some amount. if people are just throwing stuff rats can eat, then nothing is new, that's what's happening today.
just supplementary income or something kids can do to earn a bit. soda/beer can recycling costs about as much and people collect and recycle them just fine.
