I read your intro and appreciate your content.
A couple of questions. What do you mean by "adult"? I think that many of your works are on verge of 'dark'. Mostly without stepping over a certain red line, thankfully. Torture and death is not far from many children fantasies, it is not necessarily adult. But understanding certain pleasures for their pleasure value is adult. Destruction is not adult, construction is, because one has to learn how to create.
I understand that some people find pleasure in the dark and they are right to justify that this helps to avoid somebody's urge to do the same things to real bodies, to real people. But here is the inherent contradiction of setting somebody's displeasure as a condition for somebody else's pleasure. Extreme masochists want to live too, with all their limbs and health. You choose to call something "unacceptable crap as child-porn and such", somebody else will call "unacceptable crap" all the scenes of injury and death. (I am not talking here about your work but in general). The same argument that justifies gore erotica justifies underage erotica too: it helps to avoid somebody's urge to do the same things to real people.
The second question is what do you consider "child-porn and such"? I get frequently the "don't you know yourself!" answer but there simply is no single clear answer to this question. Sure, children must be protected from crime like any other people. And childhood is the formative, vulnerable age. I am not here to push some agenda or to challenge people, I simply want to know what is your view in this issue because you mentioned it.
In case if you draw the simple line of the age of consent, let us consider it 18, although it varies in different states and countries, then what about drawn characters? Would you accept your works in the same folder with Hatsune Miku who, accoding to the canon, is permanently 16?
Just to make it clear, I agree with you that you have the right to choose which folders your works are in and which not depending on the context of the folder content.