Every mailing list has their own unspoken rules on how you're supposed to use your client, reply to emails, and more. If you break these rules, you're threatened with banning.

It's an interesting and mostly correct article overall, but I must come to the defence of email here.

I would say this is a rather unfair characterisation of Internet mailing lists. I've been a member of dozens, if not hundreds, of mailing lists; I have never seen a member threatened with a ban, let alone being ejected. This may have been the predominant culture twenty years ago (and the archives witness that), but times have changed.