"Minor" is a very cultural term, the US steps of adulthood at 18 and 21 are more comparable with 16 and 18 in Europe. Also a 16 year old can consent to sex, so why not to images (particularly ones they made themselves and distribute to single persons).
For 12 year olds it's much easier with the "we don't support pedophilia" argument (which has wide support)
For 12 year olds it's much easier with the "we don't support pedophilia" argument (which has wide support)