This seems to be incorrect. I just tried multiple consecutive posts in this thread here and was locked out after the third post.
Upon attempting the fourth consecutive posts, I am not able to post it. The warning box about it does not have any kind of “post it anyway” button. Just an “OK” button which doesn’t post it.
ETA: Now waitaminnit. I just tried to make a fourth post, with a very different result. See next post for details.