There is a question https://askubuntu.com/questions/2471/how-to-hide-users-from-the-gdm-login-screen which is **5 years old**, subsequently most voted and accepted answers don't work any more.  
I needed to hide a user from appearing on login screen and I found this question, **I started implementing answers that are voted most and gave up after implementing 2 answers (and I believe so will most _internet searchers_ will).**  
The answer that works is below with very few votes. I believe this answer should be at the top because most Linux users tend to be updated with software.

So my question how to make it easy for users to find *working and less voted answers* easily? Should we start a new similar question that specifies newer version and answer that works perfectly? OR do you have any idea, please discuss here.