A note to begin; ecchi and moe in anime and manga are not necessarily a bad thing. However, the abuse of ecchi and moe ideas (in particular) is beginning to become alarming, not because of their existence, but because of how centered they have become with the mediums.
The idea of cute girls and fanservice has existed in manga and anime since the conception of their respective media, and yet recent trends in media show a massive increase in the number of these various techniques being used, a trend which I find alarming. While many dedicated fans enjoy tastes of ecchi in their anime, and the use of moe characters, studios and artists seem to be basing works upon these things as opposed to creating something original and story based. It's incredibly worrisome in my opinion, and if not corrected soon could cause permanent damage to the medium.