Deciding on pixiv number instead of name, huh. This seems like unnecessary complication that would cause constant tag adjusting madness, since one can change their pixiv username whenever they want, many many times (might even be unlimited). And the Japanese language makes for multiple uses of the same name when different kanji/gana/kana are translated to romaji. Using the number in the absolute seems like a much more stable method than going to the creative extremes used to differentiate, say, one "hato" from another.... It might be humanly impossible to remember all those numbers, but the number's the only thing that never changes. And with the number, all this disambiguating wouldn't be necessary.
Also, completely unrelated except concerning pixivness, for the "Pixiv account" link, using the http://www.pixiv.net/member_illust.php?id=* link to their gallery as opposed to the http://www.pixiv.net/member.php?id=* member profile link would be more direct and eliminate distractions caused by other pretty pictures.
I'm just a nublet, and there could well be big! big! major important reasons for either, so please don't upbraid me >.< Also, here still might not be -exactly- the right place, but it seemed better by far than posting this in the "*_(pixiv#####) aliases" thread where all the disambiguating nonsense gets done.