I feel that if kids no matter what the age or circumstances should be restrained because if they are willing to do the crime then they should be treated just like an adult who does the same things and maybe the embarrassment would deter them next time. But the way I see it if you are going into jail for any reason you should have everything that goes along with it including shackles.
It's a difficult decision - both sides have negatives. I think the best way is if they are violent or have the potential to be a flight risk, then shackles should be used. Otherwise, no.