Absolutly sick. There is no doubt they knew they were under 16... especially at 12 you can't look 16...They deserve more than two years.
Yes you really can, did you not go to school or something? It can be very hard to tell the age of some people, especially those type of girls who do it purposefully to hide their age.
This is the whole problem with the situation, you can't categorically state that they didn't look 16, but in fact looked 12, as if it's simply impossible. At the age of 13, I looked like I was over 18 and many times, say when getting train tickets and that, I was accused of being 18-20 many times when requesting a child's ticket.
They way a lot of people in this thread of acting is quite bizarre, I'm not saying what they did was right, but you're simply looking at the girls' ages and stopping there. One girl in my class at school was with some guy who was in his 20s, who believed she was also in her 20s, she really did look it, as well as being dirtier than poo on a stick. In such a situation, I'd put the blame on her rather than him.
My point is basically, stop saying it's impossible because it really is, and clearly does happen.