RE: why is baiting illegal!
What are "egg corns"?
Anyway, it is pretty well documented that baiting screws with the eco system. And really, I don't know that the law has much to do with not being able to shoot a deer over a bait pile.
If you place bait, you're feeding the population. Since deer feed primarily at night, you are probably feeding more deer than you're killing, ultimately creating a dependency for the bait. If this is true, the deer population would actually increase since there is now more food to support them, as well as their future offspring. I forget the name, but there is actually an entire cycle that every species go through that revolves around populationvs. food. Creating artificial foods for wild animals is not a good idea, even though some will argue for it.
But if you look at any area where a species has an over population problem, you have to ask why? Something, somewhere had to intervene. Had it not, a few would have starved to death and now there would be just enough food to sustain the population. Of course this is the simplified version.