I saw another article similar to what the OP first put on there.
Personally, I think FB and the rest is stupid. I enjoyed it for a time, but dropped it about 6-8 months ago as it is just too much of a liability. These days, cameras are everywhere, and I don't want to be jammed up because something I post was taken the wrong way or a friend posted what they thought was a funny picture. The fact that FB engages in shady behavior like allowing 3rd parties access upset me. I had all the security settings set all the way up, but still got advertisements on FB targeted to my interests. I don't trust it, and it isn't worth my career.
I am very against looking at text messages and Emails. Those can no way be considered a public forum.
These are scary times. Technology is advancing so fast, no one is asking if we 'should' use all of our capabilities. My answer is to turn off access to my life from those sites. I only post on here about anything, and I'm pretty darn careful with what I do.
For me, before there was the Thin Blue Line, there was the Blood Stripe! Semper Fi!
Our fear reminds us that we are not God, our faith reminds us that He is!
**DISCLAIMER** I'm not a current LEO, but have six years experience with two city PD's in NC and TX as a sworn officer. I'm in the process of returning to LEO work ASAP.