Disqus allows people with yahoo accounts to comment fairly seamlessly. This is good for Yahoo accounts, but it's bad for this blog. Over the past couple weeks, some of the least helpful comments have come from people using Yahoo. My sense is that Yahoo is so ubiquitous that it actually undermines the point of even bothering to register.
Age discrimination affects us all. Who cares about youth? James Hamblin turns to his colleague Jeffrey Goldberg for advice.