I think I heard it on 97.1 but someone had a great idea to prevent tard breeding. Every male, at birth, is given a reversible vasectomy. They are then free to do as they like until they are 25, at which point they must pass a couple tests; one physical, one mental.
At 25, most males will have had sexual encounters, have experimented with drugs and alcohol, and have done some really stupid things as most young males are prone to doing. The physical test will be to see that no serious damage has been done by chronic drug or alcohol abuse (and to make sure they arent currently abusing), you can make sure they don't have a BMI over, say 40 (or some morbidly obese level that not even Billy Blanks could come back from), and make sure that there are no STDs floating around. The mental test would be relatively simple, just to see whether they are an adult capable of creating a budget and understanding the importance of staying out of debt (not demanding that they are not in debt, but that they understand that debts carry on to your young'ns).
If you pass the tests, you get your ability to reproduce back. If not, you get another shot in a year.