Hunting is often used for controlling game animal populations. State game commissions are very careful about the number of hunting tags that they sell for this reason. It's not like people go out in to the woods and shoot whatever they want. In most cases, the state or locality actually wants that many dear removed from the herd. Most deer herds are managed almost exclusively by these methods. Overpopulation of deer is very common, and is a big time issue, especially around busy roadways.

Interestingly enough, the auto insurance companies lobby heavily for increasing the number of deer tags that are issued.