No, getting it banned is not a good thing. Obscenity laws are a massive gray area and terrible at what the public believes they exist to do. Banning drawings because they portray something you personally dislike is retarded. Arguments to the contrary typically boil down to equally as retarded ideas like "lolicon art encourages people to become pedophiles!", as if people are binary robots and could be programmed to kill by playing Grand Theft Auto.
If you don't determine the difference legally, there will be no difference. A drawing of a 12 year old getting fucked in the ass is still a drawing of a 12 year old getting fucked in the ass. Currently, it doesn't matter if the drawing looks like South Park or something drawn by Miyazaki. You're trying to involve the law in determining art. You'll kill a lot of art doing that.