Now I'm worried about what would happen if your page title included ? or !
Would the search engine know that you mean "I'm looking for a page called 'Whither?'" rather than "I'm looking for a page called 'Whither' or 'Whithe' or possibly nothing at all" ?
On the other hand: How often do real humans-- as opposed to you and me trawling for our own pages-- ask for something containing a | pipe? Do regular humans even think of the pipe as being part of the page title?