Well, the funny thing about recent notable series that have adapted visual novels is how non-perverted they mostly seem to be. Hell, Fate/Stay Night probably has the most fanservice of the ones listed so far as I know, and it is restrained to very few moments. Well, definitely not moreso than Comic Party Revolution, which was absolutely ridiculous and stupid compared to the original (albeit rather boring) series it came from.
To the best of my knowledge (and I have seen at least parts of what I'm about to talk about) the series of late that have been done by Kyoto Animation (Air/Kanon/Clannad) hardly indulge in gratuitous fanservice at all, unless you count the "moe" art style in and of itself. Which you could, but it seems to me that's setting the bar for unacceptable otaku pandering extremely low. I mean, by any reasonable standard, Haruhi Suzumiya is more perverted than them by far. So, it seems to be the case that the worst cases of what this thread is talking about is either uninspired original work or an adaptation of a mediocre manga, whereas the visual novel adaptations of late seem almost entirely interested in telling their stories. Quite ironic, really.