I think that this encryption message will help many newbie to learn, I could remember that ognasty has done this kind of thing before and I know that learning the encryption will not be hard if you understand it properly but the is that is an educative post that will make many people who has not come across ognasty signing messages and encryption messages thread to have the knowledge.
The thread you were talking about is a different type of encryption. OgNasty's thread is about signing messages from your Bitcoin wallet address. But this thread is all about PGP and BitcoinGirl.Club rewarding merits to users who share their PGP public key and send an encrypted message. You can follow any of these tutorials if you are looking for a PGP tutorial to learn how it works.
Here are some tutorials that I wrote, and another one has been reposted;
Good luck with that.