The only question is who will get the blame.
Isn't it obvious? Us sneerers and the big name skeptics (like Gary Marcuses and Yann LeCuns) continuously cast doubt on LLM capabilities, even as they are getting within just a few more training runs and one more scaling of AGI Godhood. We'll clearly be the ones to blame for the VC funding drying up, not years of hype without delivery.
The hidden prompt is only cheating if the reviewers fail to do their job right and outsource it to a chatbot, it does nothing to a human reviewer actually reading the paper properly. So I won't say it's right or ethical, but I'm much more sympathetic to these authors than to reviewers and editors outsourcing their job to an unreliable LLM.