No-one is defending the owner of the account asking for more money in response to Elon asking them to take it down and offering some compensation. However, they

No-one is defending the owner of the account asking for more money in response to Elon asking them to take it down and offering some compensation. However, they didn't take the initiative to approach Elon first and ask for money for removal of the account, and their responses to Elon can be read as just (immature) bravado. So your accusation of 'extortion' looks to me as overhyped as your accusation of 'stalking'.