I'm a lolifag and I'm gonna dissent a little bit here and say I do understand at least when an artist makes anti loli/shota rules on their personal discord, or refuses loli comm requests or whatever, even if they have drawn it in the past. If you're trying to make a living off of drawing weird porn then nobody wants to deal with the possibility of getting your income stream nuked because Visa-sama didn't consent.
I still find moralfagging about it to be obnoxious, and extremely pathetic in the case of at least one person I can think of from the MMD server who was groveling to the Ur-Moralfags and trying to win virtuous internet points even though they themselves were rendering out 16 year old characters and acting like these guys were going to invite you into the fold. That's why I got God to blow up your computer bro, get fucked