The title of a question seems to take the first tag from its tag list, for example:
The full title is
xbox 360 - BF3 What's the best....
If the author hadn't put BF3 in the title the question could have been for any game, from a search engine's perspective. Would it be a good idea to take the first two tags or maybe advise people on the order that tags should appear is important?
Or alternatively have people edit titles to include the game name. This probably extends to other sites beyond the gaming one, I'm just using that as an example.