I can't remember the name, there was an article here years ago about a loli game getting pulled from Steam (which was removing adult content at the time), and a number of people who complained about it were loli posters on MAL. If I find the article, I'll edit it here.
EDIT:
Found it lol.
Anyhoo, I don't associate with them. As long as they don't touch real CP, I just make a mental note to avoid them. @Secret Asshole made an
effortpost years ago explaining his position on loli vs. CP that was very informative and helped in distinguishing those who are just into the fantasy/artstyle from the real predators who will never be satisfied with drawings. Loli/shotacons should always be kept a leery eye on and not to be allowed unsupervised around children just in case as predators use pictures for grooming purposes to get closer to real children.