More specifically, I'm talking about this answer: How efficient is a capacitive power supply? (the second part of the answer, which is, I think, essential).
Despite the comments people have made on this answer, I must say it has already confused me a few years ago, and I recently saw it again. It has been accepted at the time, and still has >0 votes (even with all the downvotes). The user doesn't seem to be around anymore (although he has been very highly active at a time, it seems, and was having a very high rep - which adds to the confusion), so he certainly won't edit it.
Would it be good practice to edit it myself and use the strikeout style for the part that is wrong (still leaving it here so the comments and context still make sense) ? It would of course change the intent. But I'm afraid if it stays like that, it would confuse other people, as it did for me at a time.