Oh, oh indeed. I see the problem since the answer I was looking for as an example is your answer. I wondered why it was never deleted and it hadn't crossed my mind that you were stuck with it.
How can I list my open ports on Debian?
Yes, we've beat the dead horse in downvotes and it IS wrong that an answerer is stuck with that. As a general matter of course we don't want to have accepted answers be deletable, but some answer does need to apply to fixing this very particular edge case you are (were) stuck with.