Definition please (Score 2, Insightful)

I'm more concerned with the word 'harmful'. You could argue that the average age of marriage was 12 only 200 years ago. Seeing naked people can be done by simply changing clothes near a mirror. Is porn then 'harmful'? Is a website promoting violent movies 'harmful'? the desensitization of society has been documented as harmful. If yes to that, is a site suggesting that we should change the government 'harmful'? in China they certainly think so. At what point do you draw the line? Who gets to decide what is harmful and what isn't? it is a very dangerous and slippery slope to let laws that vague slide through.