I was left at home from a young age, younger than 9. It's not something social services would need to investigate TBH. Am also confused. I don't understand the OP ...
"There is no legal age for a child to be left on there own if they are sensible and mature."
what does this mean? That there is no age restriction in place in Scotland for leaving a child at home on their own for short periods of time?
"Take a 9 yr old boy for example, if you pop to the shops and tell your friend across the road you're going - they pop in and out to make sure boy is ok and he can go across at anypoint"
seems safe enough to me, particularly for a 9 year old!
"social services dont have the right to enter your home and snatch a child they phone the police, they enter and get the child"
I am sure this is right. Social Services don't have the right to snatch children and that's a bloody good thing. The Police don't have the right to Snatch anyone either though.
"your're charged with neglect, it goes to court and is chucked out becauss you have a procedure in place ie friend across road knows boy is on his own"
sounds sensible enough to me, infact I would be surprised if it made it to court on the basis of a 9 year old child being left alone for a short while.
"is it just me or is this utterly rediculous. "
I'm not sure if it's just you but I think if you are asking is it rediculous that Social services can't snatch children or that these kinds of cases get thrown out then, no - it's not remotely rediculous.