It is interesting, this particular user seems extremely active in this thread. I'm not sure if they have a bone to pick with Anubis in particular or some other reason for disliking the software so much, but to me it does seem overzealous. Regardless of if it's "bad computer science" or what, Anubis works quite well and is easy to customise to target it to specific botnets, as I've done. And this is coming from someone trying to develop her own non-PoW anti-scraper system.