I think it would be useful to mark that profiles as "bridged" or something like that... to note that this profile is a RSS bridge from a feed. Also being able to users to choose to retire or take control of that profile once joins nostr. Will think about this...
Most of them are under https://rsslay.nostr.moe which is run by #[5] there are also older ones on rsslay.nostr.net which is run by #[6]
Discussion
P.S. Private keys for this profiles are handled "in code" only and never used them in any other way...