>>11 You could switch to UTF-8 and use CSS to change the font back to MS PGothic (and other popular metrically-compatible substitutes), either globally or just for this board
That does mean some AA created here might not be fully Shift-JIS compatible, but with all the AA fails so far I'm not convinced world2ch has to worry about that too much ^^;
Additionally, it could be a good idea to include the submona font in the site (like 5ch does) so that those without MS PGothic or a substitute installed will still see AA as intended: https://github.com/pera/submona-web-font