This answer to the question "what to do if I suspect my friend is stealing from me" suggests to "set a trap" in the form of a hidden camera, which I personally don't find very socially adept or "interpersonally skillful". According to this thread on meta, it seems that the community is in favor of deleting answers that are not using interpersonal skills. I tend to agree, but would grant the benefit of the doubt and rely on the downvoting mechanism as a more proportionate measure.
However, the answer also suggests to use laxatives, which is a form of assault and thus not only unethical but also illegal. I have accordingly flagged the answer for deletion, but nothing happened.
What is the reasoning behind not deleting this answer?