Gentlemen, Gentlemen. Calm down. Take a look at Article 21 of the Japanese constitution.
Japanese Constitution
Freedom of assembly and association as well as speech, press and all other forms of expression are guaranteed. 2) No censorship shall be maintained, nor shall the secrecy of any means of communication be violated.
Even if there is a ban, the lawyers in Japan will step up and have it repealed.
The biggest problem we face are the uptight mother hens who cause the moral panic of child predators. These women live in a universe where everybody salivates over the idea of sexually violating everybody's children.
Edit: Alternative idea
Lets say the mother hens get their way and the spineless Japanese officials cave. Lolicon is banned and being in possession of it will result in a prison sentence and registering as a sex offender.
So the industry moves underground. How many artists do you think will continue to produce material? 99.9% of us don't even buy the doujins, movies and images we have. So where is the incentive for these artists to continue to make new material?
Comparing this to prohibition is idiotic plain and simple (No offense or insult intended x-gen). Prohibition had money at stake. People went to speakeasy's and paid top shelf prices for bottom shelf rot gut. People died in gang violence in the same way people die in gang violence today because men could get rich and quickly by bootlegging and smuggling alcohol.
Prohibition proved to be counterproductive in that it promoted the heavy and rapid consumption of alcohol in secretive, nonsocially regulated and controlled ways. "People did not take the trouble to go to a speakeasy, present the password, and pay high prices for very poor quality alcohol simply to have a beer. When people went to speakeasies, they went to get drunk.
As the problems caused by prohibition increased and spread to small towns throughout the country, there developed a movement to repeal the Eighteenth Amendment. Women had been at the forefront of the temperance movement in an effort to protect their families. With the spreading violence, emerging patterns of binge drinking, disrespect for the law, and other serious problems, women led the repeal movement to protect their families.
Lolicons like us are mostly broke college students who can barely feed themselves during schooling. We don't have loads of cash willing to purchase doujins at top shelf prices for bottom shelf quality. Violence won't break out because lolicons won't have access to their smut. If it gets banned the only way it'll be protected if is the fans and the lawyers step up to challenge the ban. Most, if not all of us hide our fetish so most likely if a ban sticks then it'll stay.