To make things clear, I don't see anything inherently wrong with anime. I used to watch it regularly. Sometimes I watch it on the odd occasion. Most people aren't negatively affected it, as long as children only watch anime that is suitable for their age group, like with movies and western tv programmes.

However, there are some people out there who fetishise anime, believing that looking like an anime character would make their lives better and make them sexier. They see the world in anime cliches, act in what they stereotypically believe to be Japanese behaviour, and engage in weird sexual behaviour through a yuri/yaoi lens. These people become obsessed with anime, like it's a hard drug. And they do unhealthy things. It's not easy for me to explain, but browsing through DeviantArt will make you see what I'm talking about.