The fidget spinner is a global phenomenon that has inspired thinkpieces about cultural anxiety, the changing retail landscape, and above all, whether or not it should be allowed in the classroom. Many teachers have embraced the toy. A few pundits quickly hit on a counterintuitive take on Facebook’s move. Spam is good, argues GigaOm’s Mathew Ingram, spinning the like-bait crackdown as an example of the irksome paternalism inherent in Facebook’s…