If the individual lives in Europe, you don't have that option. If they
want the data deleted, comply or be fined a fairly significant amount -
the greater of E10,000,000 or 10% of gross worldwide revenue.
?I support the notion? that a member ought to have the ability to remove their own contributions, but until this interpretation of the GDPR is proven in the context of group contributions I believe statements like that to be rank fear-mongering.
I don't believe it has been established if or how the GDPR will apply to online communities or specifically mailing list archives. Such contributions are qualitatively different than personal information collected privately.