This show is a bad influence? Haha, oh gosh...
If you people only have problem with how the girls are proportioned, then the show clearly isn't as bad as few of you claim it to be. The girls are drawn slightly skinny, yes, but that is just the style of the show. Yes they are a bit on the skinny side, but at least they don't have large breasts and wear practically nothing at all. (Like most women/teens are portrayed in animes) The girls hardly wear anything as revealing as few of you claim. Sure they show their bellies once-in-awhile, but at least their clothes are tasteful. Tecna hardly reveals anything; same goes for Musa, Layla, Flora and Bloom. (Stella tends to wear strapless dresses but, is isn't that bad) The most revealing outfits they wear are there Sophix and Lovix outfits and those are shown in one episode. Big deal.
The girls are not self-centered and do not only care about boys and their reputations. Each member of the Winx sends out their own positive message and the characters themselves are not vain and do not obsess over boys. (Stella maybe, but that's about it) Tecna is smart and cares very much about her studies and being successful in life; Layla is strong willed and doesn't let a difficult task bring her down or discourage her from why she's trying to accomplish; Musa enjoys the arts and music, being creative and supporting creativity; Flora loves nature and tries showing this in mainly all the episodes she's in—reinforcing that we should and love and appreciate the Earth we have; Bloom is a leader and believes in trusting your friends and believing in yourself; even Stella sticks up for her friends and shows that beauty isn't everything.
I also like how the show incorporated real-life situations. Stella's parents are divorced; Bloom was adopted; Musa's mother passed away—all very real situations that an audience of teen girls can relate too. (Some more than others) I know that Stella's situation will be the most relatable and I like that they added this hint of reality into the show. I for one, respect Stella's character more due to this. She struggles throughout season one dealing with her parents being apart. She loves them both equally and really feels awful that they separated; she even blaming herself at times.
And what's wrong with a little romance? The girls are teenagers so they are bound to have a love interest. They hardly even kiss throughout the series so I don't see what the problem is. (Plus, when season five came around, the girls were already in their 20's so...there shouldn't be a problem with hugs and kisses)
This show isn't a bad influence and if you still think so, you might as well take Barbie away for driving a convertible; take Pokémon away for promoting 'animal' fighting; and take Harry Potter away for portraying evil and promoting sorcery.