This comes up a lot, and the comments for these posts always get mired in the complexities of for whom and forwhence and forwhicontext this is good advice.

Basically, there are people for whom this is really fire advice (like people who are unnecessarily repeating quirky aspects of their otherwise lovely personalities), and people for whom this is really bad advice (like people who need to stay hidden for safety, or jerks).

Broad, overlapping categories with many dimensions. Not really something you can wrap up in a prescriptive axiom.