Community Help
Arnis, you probably need to completely delete that "Preparing documents for accessibility" CH thread, rather than just lock it.
My response and your response (but, curiously, not the empty basenote), show up as discussion on the referenced Help page.
I also see apparently active Reply links there, with no indication of locking (and I don't plan to test them).
Is this a broken Help feature that accidently got turned on/discovered, or is it expected that, once debugged, users will be able to initiate and/or respond to discussions from Help pages?
It could turn out to be a handy way for users to clarify or expand upon Help content.
It could also cause Help pages to get cluttered with the sort of topic drift that is all too common on the internet (particularly if forum users don't realise that their responses are logged elsewhere). Presumably some web wardens will keep an eye on it.

