Yes I realise that. But OP is not suggesting that children be banned from wearing non reflective coats - it’s not the children who would be being policed. It would be the sale of the clothing.
There are plenty of regulations on children’s clothing. I was aware of the no drawstring hoods for 7 and under, but I’ve just looked up a few more and there are regulations on specifics for drawstrings for 7-14 yr olds (they’re allowed but have to meet criteria), on how securely small parts like sequins have to be attached, children’s nightwear must meet flammability requirements. No one polices the child in these cases, what is restricted is the products sold.
Should we do away with the flammability criteria for children’s nightwear because some children wear adult sizes and some children are visiting from abroad?
Are people suggesting the children would be policed being deliberately obtuse?