It's hypocritical that the BBC are criticizing lolicon and free speech/expression because they find it offensive, yet defend drawings of the Prophet Muhammed and free speech/expression, despite the fact Islamic communities find it offensive.
They're both drawings. Freedom of speech, thought and expression do not end where you want them too. You have to defend the indefensible.
Child abuse is illegal because it has a victim. There is no victim in a drawing. It's like arresting people because they commit murder in video games.