Where I hunt in iowa, we have exactly that, check stations and have to shoot a doe first before you can harvest a buck. Does it work yes, have i brought button bucks into the check station yes, do I think it hurts the buck population, no. I think that is the only effective way to control the population for qdm you have to shoot deer of all ages and all sex. The program i am in, is working, the results are unbelievable I think if the whole state was like this, the results would also be unbelievable, ive seen it first hand and know it works, most hunters gripe about having to shoot a doe or two, that normally wouldnt, i know guys that complain ive never shot a doe in my life and they are making me shoot one, and i bet there are many others out there like this. if there was 12,000 Nr out there that had to shoot a doe first or at least had a cheap tag to shoot a doe that could be 12,000 does where in reality its probably more like 24,000 to 36,000 does shot due to next years fawns, so it could help populations. just think of every roadkill out there, there are tons of huge bucks does, fawns button bucks etc. taken off you hunting lands due to cars yet, most people dont gripe about that, but a guy shooting a button buck is almost considered a murder a sinner to the deer hunting world, they say survival of the fittest and i guarantee you a button buck that has made it through all of iowas seasons that first year is a deer that i want in my deer herd, not one that will actually look at you and never spook while you are drawing your bow. I think of it as in if somebody really wanted to truly only shoot big bucks, then they would have to pass on every 140-150 class animal they see and only shooot the 170+ class bucks which that would never happen, to some shootin a 140 class buck with potential is just as bad, if not worse than shooting a button buck. okay im typing too much, i just think that most wont try to shoot the button bucks and shoot a doe but thats not gonna happen a few will get shot, i shot 4 mature does and 2 button bucks this year, it happens