People are up in arms over this one, most people seem to think that they are safe and/or anonymous behind their chosen internet handle. However this is not the case. As a TF2 server Admin I have seen many trolls get blown away when their personal info is posted in response to their trolling posts. Just by Googling the Handle some people use, you can start to gather pieces of personal information, email, phone numbers, real names, places, jobs, etc can be found in a matter of minutes, one piece of information leading to another, which leads to another, and so on until you have a complete picture of someone.
You are not now nor have you ever been anonymous on the internet. With this change, adults will be expected to act as adults. If you don’t want the public to know what you are up to, don’t post it on the public internet, it seems rather simple to me.