Hi Brian, Some of the people who have received temporary bans have then come back and been relatively well behaved thereafter. As a member of the Debian Community team, I'm certain that the listmasters have banned people for short periods in the past. Rather than being judgmental or jumping to conclusions: consider that it might not be advisable to identify individuals immediately on request?
People on this list notice that I post the FAQ every month: it is probably also worthwhile to say that the list is covered by the overall Debian Code of Conduct - https://www.debian.org/code_of_conduct - which specifically mentions temporary and permanent bans as a possible measure. This is also true for #debian support channels on OFTC and Libera.Chat, for example. Hope this helps, all the best as ever, Andy Cater