I'm a big fan of fanservice. Just yesterday I asked myself, "why don't they make shows/movies with fansercive like in anime?"
I wrote alot about it before and I see the "hate" from two sides.
1) I watch alot of Ecchi shows and it's an art on itself when done right. As mentioned before, I also see 3 catagories. You can have hardcore fanservice like Ikki Tousen, kanokon, I like those shows, it's fun, great characters and good Ecchi. Next we have some with more story, Girls Bravo, B H Gata Kei, Love Hina,... and as last "serious" with a touch of fanservice (which I consider normal as in point 2).
But a bad show will always be a bad show, no pantyshot can safe Strike Witches. Lately I notice an increase in nudity, those shows also carry the Ecchi tag while I don't see anything sexy, naughty, erotic, etc. in those shows. Qeens Blade, R-15, Ladies vs Butlers,... are shows I dislike because they offer nothing. Those shows are full of meaningless nudity, there's no value in just trowing boobs at you. Artistic value is zero.
Note: Many people complain about HoTD but I liked the show just because the fanservice, mediocre zombie show + fanservice = me happy.
2) People seeing ghosts. Some are too focust on looking for things that aren't there. If you watch western tv shows and movies you will also see partitial nudity, shower scenes, a girl in bikini, sexy ass shots,... But people don't see it because they aren't looking. Here you have your anime elite, they see sexy girl: complain about moe. A 8 year old girl: complain about loli's. Something erotic or just a girl in towel, bikini, pantyshot: complain about fanservice/Ecchi.
So yes, fanservice hate is nonsene. The majority of shows aint focused on fanservice and they don't show anything different than regular tv shows and movies.
If you hate a show due fanservice then you have watched the wrong show, it aint for you.