Not malicious.
Nos.social however is a malicious client run by extreme leftist ideologues. Avoid at all costs.
nostr:note1vff6j4fxfkgy0y226295p8fq46e2f7p2ml07xn4w3pzzf52jy6tqcy68lcquotingnos.lol is run by someone (npub1nlk…jm9c) (a generous nostr OG). It has nothing to do with nos.social, a client Rabble (npub1wmr…g240) (a legend) and a team work on and their associated relay is relay.nos.social.
nevent1q…fdmx
You can learn more about their OPTIONAL content warnings here: https://nos.social/tagr-bot