>>2562
>banning upload via tor
That's a kind of censure... if, for example, the subject need to post a image to express some idea, this can be considered a censure.
A better solution would be implement a algorithm within the imageboard engine to identify if the image posted is porn or not. If he detect it as porn, put automatically as spoiler. Else, just leave it.
This software seems to work (written in python - MIT licensed):
https://github.com/bcho/porn-image-detect

I don't have enough knowledge of python to work on this, but for someone that already know this language, it would be pretty simple to do.