I think a temporary solution could be posting pictures on some other picture host then just giving links to them here. It may be even easier than dealing with all that gurochan spam protection hell.

Same with pixiv, as you can just post preview and then give a link to some other host it is just problematic that when using this method pictures may get deleted by that other host because of inactivity or something like that
My suspicion about Pixiv is that they really hate dicks of adult men as other stuff seems to be ignored.

Now it is not that hard to get into lolicit because you essentially only need 3 people to rep you and most have huge rep power nothing comparable to what it was a few years ago when only moderators had it, making 20 posts may be an even harder task