I have in this question: How to remove href tag from CDATA an example of an answer (of mine) which while valid, especially for developers looking to avoid 3rd party libraries, was not used by the asker. In spite of what were (in my opinion) clear instructions - the user used the wrong regex string even after multiple attempts and did not see their desired results, and so gave up on the solution and downvoted it.
As an answerer defending my rep (especially around a milestone that controls privileges) - my only immediate reaction is to delete the answer so that the downvote no longer counts towards my rep total.
I still strongly feel that this sort of answer would be useful to future visitors who aren't limited by the inability to follow instructions - but why leave it up when all that effort only leads to a loss of rep?
(I apologize for the frustration exhibited in this post.)