Its the new way of the Internet
With the growth of social media being anonymous on the net is becoming less acceptable and rightly so. In all but a few cases there is no need to hide who you are.
The idea that this may lead to a reduction in security is not valid, a feeling of insecurity is a good thing from a security point of view - it heightens awareness and scepticism and will actually make the internet a safer place.
Removing the dark places were nefarious activity can go undetected improves the environment in real life as well as the virtual one. If you are embarrassed at the thought that someone will now its you making a post then maybe thats an indication that you are being a dick-head and should not do it.
Enjoy the freedom of knowing who you are communicating with.
I am Ian Godman