@fernandomaroto So those developers added code, so their usernames would pop up depending on a sequence of actions = Easter egg! since “The LightDMMock project is tightly based on the source C code of Antergos’ lightdm-webkit2-greeter”, then it makes sense, and you may be right, or it may be possible that he or they worked on the original Antergos greeter. I am not an insider, so I wouldn’t know that either way.
So I would have to make an educated guess that it is in fact just a harmless Easter Egg, which was put there for fun. If it does involve some malicious code, then putting in their real user names would be a sure fire way to ensure that they get caught, and they would have to be pretty stupid to do that considering the possible consequences. In some countries you can go to jail for that.
@blinky could isolate his personal data, or back it up to be safe, add some dummy files and folders, and run it for a while, just to see if something malicious does take place, as well as try to retrace his steps and find out just what sequence of events triggers it, if it has not been deactivated or auto destructed itself.
Either way sounds like a mystery someone with the skills would love to crack.
I have never run into an Easter egg myself by accident, but have read about them, and some were well documented once people figured out how to trigger them. In Microsoft products there were quite a few, that were put in with Bill Gates blessings. If you followed the steps correctly to invoke one, you could see them in action. One was animated and even had music. There was one on early mac pc’s that ran a funny Apple advertisement… It is very common to list developer and project team members handles.
I have been messing with computers since 1978 (hardware side) and they are just a way of saying: “Hello world, we made this”.