How funny, pictures of imaginary children are more disturbing than pictures of people getting mutilated in the most gruesome ways. Where the world is going? LOL


But getting on topic:
/3D and /Art boards are where people post their own work and they are not classified according to the content, they are classified by the artist who makes them. So this rule would not apply there anyway or it would be very troublesome.

Doing this it other boards would cause other problems, because now you kinda need to create all same boards for loli content, this way doubling number of boards on the site.

Finally, there is almost no way to reorder all content which is already uploaded. Sometimes it is even hard to decide if this is loli or not.

So the best solution is just to ignore the content you don't like.