Last modified: 2014-02-19 22:28:59 UTC
Whether or not the topic title /should/ be allowed to contain wikitext, is discussed at bug 57153. This bug is just to display a warning to the user, that their wikitext will not be acted upon, if they start typing wikitext into the topic-title box. (Sidenote: Possibly you could use the same wikitext-detection and/or warning-widget, that VE uses? (For which, see bug 49820))
The WMF core features team tracks this bug on Mingle card https://mingle.corp.wikimedia.org/projects/flow/cards/574, but people from the community are welcome to contribute here and in Gerrit.