If I ever have the chance to get asked in any context what Supreme Court case was wrongly decided, my first response will be Griswold v. Connecticut. Millions of babies have paid the ultimate price for married couples in Connecticut to enjoy the thrill of a condom purchased in state.
A very close second is Wickard v. Filburn.
here is a great video from ReasonTV explaining this ruling and its pernicious effects.
ht to wizbang