What an emotive topic!
To be honest I can understand it as it became a real safety issue. I work with a boy who is blind and has learning difficulties, he went through a stage of leaving his room in the night, quietly so nobody knew and wandering around unsupervised. His mum was really worried, but social services told her not to lock him in as it violated his rights, then one time he fell down the stairs. His mum was distraught. Luckily he wasn't badly hurt, but all social services would suggest was a protective helmet.. which seemed ridiculous as he woke up at night and did this, surely they didn't expect a child to sleep in a helmet?! I don't honestly know what she did in the end, but I hope she didn't feel too judged if she did chose to lock him in. She's a fantastic mum by the way, she devotes her whole life to her little boy, and he's come a lot further than anyone ever expected thanks to her hard work and love.