FYI .. many ACM conferences are now asking explicitly if an IRB was required, and if so, was it received. This does not prevent researchers from saying IRB doesn't apply, but perhaps it can be caught during peer review.
Btw .. I posted a few times on the thread, and want to acknowledge that researchers are humans, and humans do make mistakes. Thankfully in this case, the direct consequence was time wasted, and this is a teaching moment for all involved. In my humble opinion, the researchers should acknowledge in stronger terms they screwed up, do a post-mortem on how this happened, and everyone (including the researchers) should move on with their lives.
