People get mad when the lolicon crowd for saying stuff like "it's not harming anyone." But they are actually correct in their worldview.
I'm a Christian

, so I have a completely different standard for morality that does believe that sins against yourself are still sins. Even if no one is quote on quote "harmed" it is still morally wrong.
But a lot libertarians (which is one of most common worldviews in the West today) are kind of stuck between a rock and a hard place. Because if your position is the "non-aggression" principle is true. Then you would be consistent if you argued that lolicon and content similar to that was perfectly fine.
If you're pro-porn or (neutral) on porn. You would have to be pro or neutral on lolicon in order to remain logical and morally consistent.
I am against both.