Several of these have an up-skirt with a well-outlined mons, and you're asking whether we think they're in bad taste? Of course they are, and they're not very funny, either. But then, I don't wish I was Japanese, so I don't instantly attribute cleverness and creativity to anything that resembles anime.
Honestly, though, many of these don't make any sense. Some of them are okay (Pol Pot, for example), but the vast majority of them are just sexualized female forms with a sideways, throwaway reference to the supposed subject material. I mean, honestly, with a few exceptions (Mao, for example), if you just showed this to someone without the label underneath, they'd have no idea it was supposed to be a charicature of that person.
So, overall, yet again the internet has made me feel those same old feelings. Namely,
http://25.media.tumblr.com/tumblr_m6dy9pLEUP1qgkmueo1_500.jpg