Annepl, the point i was making was that whatever you feel about smacking, you cannot impose that view on any other parents, if they act within the law.
it is not your decision.
you seem to be rather proprietorial about grandchildren. i would urge caution, as this is the kind of thing that can annoy parents and lead to LC/NC.
and it is open to interpretation as to what treating a child with love actually means in practice. some people seem to think it means giving them everything and anything they want. others think it means keeping to a strict routine so they feel secure. you can only impose your practices on your own children. that is almost a definition of a parent, the one in charge of a child. no one else is in charge in the same way.