It's always fantastic to honour those who serve their country. You are right most famalies wouldn't have a clue that their loved one is entitled to drape the flag over the coffin. I was at a funeral a few months back and the undertakers whilst being respectful didn't know how to fold the flag properly, having participated in a few Military funerals myself, it was evident to my eye but the family in their grief probably wouldn't have been able to tell the difference.