Board Thread:Support Requests - Getting Technical/@comment-5558012-20160711205214/@comment-1757994-20160712060946

It was still editable via the API. I know some VSTF (who are discussion mods globally) have a tool to fix unmatched tags in threads, because I've seen them do it. Broken mark-up messes with the HTML, which makes it hard (impossible) for jQuery to find elements.

FWIW, the newest full release of MediaWiki (1.27, 28 June 2016) has introduced a new behavior to the parser. If there's an unmatched tag, the tag is ignored. So, for example, if there's some wikitext like This is a balanced div. This is an unbalanced div. It renders like:

This is a balanced div. This is an unbalanced div.