Blocked users (almost always) can still edit their talk page, and indeed, this is a critical part of the feedback loop for them to discuss, learn and get unblocked.
Description
Description
Event Timeline
Comment Actions
Tried testing this, not sure if this is still the case.
I can edit talk page via MF even when blocked. Also, I noticed that there is a separate block criterion for blocking users from editing their talk pages.
@Jdforrester-WMF correct me if I'm wrong to say that this seems to have been resolved.