No-sword’s post on this is already brief, so I won’t shorten it here other than to note that sentences like “The furigana undermine the kanji at the most fundamental level, but the overall meaning of the poster remains unchanged” are the sort of thing that really make my day.

Just go read the whole post, which discusses something at the intriguingly titled Moji no ura-d?ri (which Matt translates freely as “The Back Streets of Orthography”).