He should clearly explain upfront what he is doing for the massive public and the risks involved following his approach, which is perfectly understandable as it happens with every other investment.
I do agree that it would behoove his project to clearly enumerate that it's experimental and the risks involved. But that's a good comment for him, not a flag.
Edit: The article you linked to is incorrect, unless the word "pegged" is different in cryptocurrencies than elsewhere in the world of finance. Please see: https://en.wikipedia.org/wiki/Fixed_exchange-rate_system
You can decide to talk about stable coin approaches which is a more precise term.
I mean, even China had a currency peg not too long ago. It was an enforced exchange rate, nothing more. No explicit reserve backing it up.
The comment is a little bit off topic, but I for one don't mind though I'm not sure about whether or not it's within the rules.
If you have information that this project is unethical, please spill it. Otherwise, please don't flag comments like this. It's clearly of interest to hackers and thus is appropriate on HN.
Edit: Also, as others have pointed out, you're misusing the term "clickjacking".