Does anyone look for old answers to their questions by doing a title-only search?

Yes, I do. It returns results more quickly (than super-search) and one suspects that it is less heavy on the servers. If that doesn't return any (relevant) results then it is usually worth going through super-search.

I never use any external search engine to search this site.

So, there's one data point.

Why is this post ... deemed completely acceptable

FWIW, I don't think that it is completely acceptable and would prefer to see at least some problem-domain context in the title. However, it does at least suggest that the poster has some code and is looking for an explanation rather than something like PERL CODE which is (a) needlessly shouty, (b) content free and (c) merely hides a gimme.

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