I don't think anyone believe that the "think of the children" argument leads to "unintended" consequences. They are thoroughly intended. It doesn't look like that, but policy makers do analyze potential impact and this is a problem you understand if you are more than 5 minutes into the topic.

Although I do think they overlook that their legislation is restricted to their domestic market though, so any potential positive effect is more or less immediately negated. That is especially true for English speaking countries.