While he might be right about it being less dangerous than you think, he did not have sufficient information to take 10:1 odds, and commenting as he did signals low caution. Unless there is some point specifically in his favor, you probably should not message him.
A few notes:
That said, I tend to agree that there are plenty of other people on this forum better qualified to evaluate if an idea is dangerous. However, the odds (here it is, again) of Eitan's idea needing high qualifications to evaluate are tiny.
I'm interested in discussing this with someone, non-publicly. It's safe to know about personally, but it's not something I'd like people in general to know.
I'm really not sure if there is a protocol for this sort of thing.