Correct Junction

In reply to a recent comment I figured the best thing would be to give an example, In an older post I had shown a flying splice that has No junction box, There are many reasons why this is wrong, one is its a fire hazard the less obvious are a shock hazard should the wires become exposed, here is a picture of a junction box this is the correct way of splicing wires together, after the splice is made there is a cover that goes over the opening.