Children are special and valuable

Parents:  You have been called to take up your position as a committed parent, guardian, grandparent and or trusted adult to make sure our children are safe.  The safety and well being of our children is first place.  There are so many defects, mistakes, errors, misjudgments and wrong choices that adults can make that could bring harm to our children.  We must do a better job.  When parents are not watchful at a restaurant and allow their child to roam around the restaurant unsupervised and in the process, child is seriously injured and dies later.  Who is to blame?  

When a parent allows a toddler to roam around on the 3rd floor balcony of hotel unsupervised and falls to her death, who is responsible?  Or was it just an accident?