Dove population seems pretty healthy to me. They eat monsanto corn and soybeans w/o any problems around here.
However, I do think the usual concerted effort to check for HIP survey completion and plugged guns is pretty weak sauce. Two wildlife laws that have practically no impact on conservation, yet are rabidly enforced because they bring in revenue.
I know someone will come in and say someone with an unplugged has more of an advantage than someone with three rounds or less. Show me someone with over three rounds in their gun and I'll show you someone who is missing birds when they get to the 4th and 5th round. There are maybe a handful of people in the world that could take advantage of a 4th or 5tth shot when it comes to wing shooting. Your average slob on his 4th or 5th round is just supporting the ammunition industry.