they're often aggressively over populated (due to lack of predator animals, wolves i believe) as a result they tend to be culled by hunters who do it for sport/meat, and it keeps their population in check.

They often eat a lot of plants and other vegetation. So can destroy and damage gardens, be a general nuisance, and as a result of over population, can cause significant damage to an eco system. (as well as get in the way of road vehicles, which tends to be a bigger problem in rural areas) it's dangerous

I'm no hunter or avid outdoorsman though, so if someone has some additional insight, nows your time to speak.