The original author of What is Penrose’s Twister theory? edited the question and added manually the word "[closed]" to the title. As a result, the question looks like it's closed at first sight, but in fact it isn't.

That looks quite odd --- I never thought about this possibility. I think this trick is worth noticing. Do you think it could be exploited by someone with malicious intents? You can only use it on your own questions unless you have high reputation, and in any case it is easy to detect automatically and leaves permanent track in the database; so the answer seems to be "no". But maybe my "black hat" mind isn't twisted enough.