We've previously come to the consensus that spoilers should not be included in question titles.
However, some community members on this site have been including spoiler warnings in the question title. For example, the title of this question originally read "Did this character do this in The Physics of the Dead? [Spoiler]".
Out of consistancy and readability, could we agree on not using spoiler warnings in question title? We're already assuming that questions about a book spoil a book. In addition, warnings like "[spoiler]" look really ugly.