We all know that smart people can do stupid things. Politicians come to mind. So do celebrities. And then there are all of those unfortunate Darwin Award recipients, many of whom had college degrees, high-profile jobs, and managed to use the word âantidisestablishmentarianismâ in conversation a few times a year. And then, of course, there are smart parents who, unfortunately, have a propensity to do something pretty unintelligent (read: stupid) things when it comes to spending money on their kids. Here are some of the most common examples: Buying a ridiculous amount of birthday and Christmas gifts. The big problem…