Even scientists are gullible
Two of my colleagues have fallen for scam scientific journals passing for respectable ones of similar or even identical names.
One of them working now in a different institution have published two papers (each for something like $3000) in a scam journal and never noticed something was wrong. He was so proud of the papers I had no heart to tell him the truth during our brief meeting. Especially as my history of contacts with the person was not on the "friend" level.
I learned about another one yesterday. A colleague from my institution showed me her paper in a journal I knew had been hijacked and ask me why this paper is not visible in the Web of Science database one year after being published. I double checked (there was a small spelling difference in the journal name, the ISBN was identical but it was not the same journal) and send her an email explaining what happened. She has not replied yet and I'm feeling bad about letting her know. But someone should.
It is a shame such fake journals exist for years even if they are based in some rather shady corners of the world. But I'm still surprised that a scientist can be duped by (I guess) a simple email with a link to the false webpage.