Interesting.
Under the new post model, flagging a thread's root post as non-rebloggable affects only the root post and any reblogs without comments; reblogs with comments which were made before the root post was made non-rebloggable now remain rebloggable, regardless of the root post's settings.
Further, there doesn't seem to be any mechanism at all for flagging a reblog with comments as non-rebloggable, not even by the reblog's own author; the upshot is that any post that's been reblogged with a comment even once effectively cannot be made non-rebloggable at all.
Between this and rendering nearly all non-first-order reblogs with comments undiscoverable to the author of the original post, I imagine harassment campaigns are going to have a field day!
