As many seem to have overlooked itb this is from more than a decade ago.
And to those setting "not being toxic" == "being vague":
Suggestion if you're in a situation: separate the subject discussed from the person and, to the contrary to what is said in some other posts, be very specific!
Improvised example:
Hey all,
patch xyzz and its aftermath communication is unacceptable.
It's content is not to the standards we have set here (explain).
Even worse, in the communication aftermath we blamed behavior of user space applications for bugs that are within our domain instead of owning up.
The bugs within the kernel will be focused on with highest priority by a, b and myself.
For the communication: (consequences). As explained the patterns shown here are unacceptable.
I have decided to no longer have x as a kernel maintainer on our team/enforce pairing for all communication/set up stricter consequence catalogue. Any specific action,really...
Not perfect as it's very early here, I haven't slept well and I'm not deep into the topic.
Just remember to separate subject to be discussed from person(s) acting please.
And always remember: bad communication is really easy and a lot of managers trained that their whole life! ♥