I will say if I post a fictional cartoon character I find attractive, I always make sure it’s at least a character who’s 18 or older, a grown up version of a once child character who aged canonically, or the character is at least at the legal age of consent (16).
From looking at these posts, some have come off a bit questionable, I agree, but my personal mentality if it’s a cartoon character is just “you do you” as long as they aren’t letting it affect who they are, cause in the end it’s not my business. If they actually try and go after real life underage kids because they think their attraction to underage cartoon characters gives them that advantage is a whole different ball game for me.