The furry example is a good bridge to the Loli.

They may not wanna fuck them but they wanna become them. Then groups of them become them and wanna fuck each other within the group.

It seems harmless at the moment but it could start a slippery slope like gay to LGBT to drag bordering on grooming kids if these groups get a little bigger and more vocal.

To the first point because the represent Loli like real life people, it again makes it appear harmless and related to fiction. But over time the appeal gains traction as it becomes more mainstream, normalised, and as more fans cross boundaries with their fandom. I see it happening more in the West first