Yeah. From a usability point of view, I think it's important to hijack some shortcuts, but only those who are not commonly used for such as the one mentioned in the article. I would also argue that this behaviour of blogger is not what users expect, hence it is not a bad behaviour. Wasn't there a pair of shortcuts commomly used for this purpose, Ctrl-K / Ctrl-J if i'm not mistaken?
The actual bad smell of infected people was believed to be unhealthy, so afaik most plague masks were built to provide a "good" smell through herbs or incent, but it seems plausible that some of them helped nonetheless.