The question mark and "a terrifying idea" are editorializations not in the actual comic title.
sctb / dang / mods?
(Do you people search for regexs or just read HN a lot?)
Yes. Submitted title was "(XKCD) Voting software? a terrifying idea". That breaks two of the site guidelines: the one against editorializing in titles and the one that asks you not to include the domain name in the title text (since it shows up next to it anyway).
Submitters: accounts that break these rules eventually lose story submission privileges, so please don't do that.