We’ve been warning kids for years not to put personal identifiers on the internet. Still, a new study from Pew shows that 71% of teens have mentioned their school name on social media and 20% have posted their cell numbers.

Okay, maybe this is just the paranoid mom talking but these numbers scare me:

I’m shocked but not surprised by this chart or anything in Pew’s new study “Teens, Social Media, and Privacy.”

The entire report is more proof that 12-17 year olds are not only comfortable on social media, they’ve learned how to navigate the treacherous waters better than their parents. Look at these numbers:

As a nation, we’re not shy about expressing our feelings in public. When things happen – good or bad – we react en masse, pouring our heart out in blog comments and on social media. When it comes to tragic events in particular, Twitter is like the first responder on scene. People close to an event will begin Tweeting within minutes, long before the news crews have the story. From there, the circle grows and grows until the whole country is talking and reacting. It’s at that peak moment when the Hedonometer goes to work.

Hedonometer.org is an instrument that measures our populations mood in real time using social media reactions. At the moment, it’s all Twitter based but researchers Peter Dodds and Chris Danforth say the concept can be expanded so it works with any social media input.