I wonder how he identified them when they had not posted anything. I do not know whether it is possible to find out without any post which account has just been created or has been created and has not used it yet. Although whoever has done such a thing and I am also confused that it is not possible to register the same name twice on Bitcointalk, how did this Ab de royse777's name come up in such a way. In addition, whoever identified them told about it in a few moments, which is commendable. Hopefully, some of my questions will be answered because I am confused in understanding how he can do this and how he immediately identified him, which is revealed in the picture over time.
I think you only saw 0 posts in the screenshot in the OP, even though what actually happened before this Thread was created the account made 1 post with proof.
https://bitlist.co/post/66453819
http://bitlist.co/post/66453799and the possibility that When the OP finds them, they immediately delete the post, then the OP screnshoots his profile which already has 0 posts.
At first I was also suspicious when you said that, but after I checked further, it turned out that there was a previous post, as I said above.