One common grievance of the ZIO crew is that Wiem Zine El Abidine (a Scala developer and ZIO contributor) was uninvited from giving a keynote at Skills Matter's Scala Exchange conference in 2019, because of the efforts of people who wanted John De Goes (her co-presenter) to be deplatformed. This isn't true: Wiem was not uninvited, only De Goes.
For what it's worth I don't know of any evidence that Wiem herself has ever made this claim, but many men in the community have:
This is a witch hunt. >