Topic on All The Tropes talk:Creating New Redirects

Mm. On actually starting to write a revised version, I recall that the original reason for the guideline as written was to make it easier for users to find names which contained characters that could not be typed in easily (ie, having to resort to ALT+number on keypad). So yes to adding ligatures and math symbols, but not necessary for "@" or ampersands. We were also at the time trying to balance redirects necessary for functionality and ease of use against a flood of redirects for every possible variation in capitalization and punctuation. I think given how easy it is to type in "&" that we actually need to discourage (and actively hunt down and delete) redirects that use "and" instead.