(Someone might ask, "Why provide an interactive
question and a link;
why not just quietly redirect?" But that defeats the purpose of being
caseful and makes it difficult or impossible to create a second entry
with the other case. If you're going to redirect in this case, you
might as well turn on $wgCapitalLinks and be done with it.)
I cannot follow this line of reasoning. The purpose of "being caseful",
as you call it, is to have (1) correct article titles, and (2) the
potential capability of having separate entries differing only in their
capitalisation. Neither of two have anything to do with redirects.
I would favour an approach where, if the user visits a title that
doesn't exist but the same title with different capitalisation does
exist, the software pretends there was a redirect, and displays the
"redirected from" message that allows you to click back to the original
title in case you actually need to create a separate article. I would
actually favour the same approach on Wikipedia too.
Timwi