(nit) Please don't use "conflict of interest" that way (casually). It should only apply to situations where there are actual legal or ethical obligations in opposition. Nobody owes the online CRT community anything.
Point understood, but do you think there's no obligations to communities or societies, other than those codified in law, contracts, or some (professional?) ethics?
If those other obligations existed, could we say "conflict of interest" about them, or is there a better term or phrasing?
Not who you were responding to, but I think there is no conflict there. If he was a known member of some preservation society, then maybe there would be a conflict of interest of the ethical variety, but as far as I know this person is just an enthusiast. They serve their interests and no other, with respect to this particular space.
(nit) Please don't use "conflict of interest" that way (casually). It should only apply to situations where there are actual legal or ethical obligations in opposition. Nobody owes the online CRT community anything.