Responses
But dg's face was completely blurred on that occasion, it wasn't recognizable. Chanwoo barely recognized him from the voice while watching that broadcast with md. Also I don't think the author makes such a serious thing happen at this point of the story. If this is the case they would be super screwed

Glasses-San MIGHT actually be an avid watcher of BJ Alex and might have recognized Alex. After all, DG's face WAS seen at one point during a stream, so he might have screenshot it and put two and two together.(⊙…⊙ )