This exchange between Esa Lindell and Ryan Bortuzzo is a good example of why you don't dive

Stars defenseman Esa Lindell and Blues defender Robert Bortuzzo were awaiting a loose puck in the corner when Bortuzzo made contact with Lindell, who went down like he had just been hit by a truck. When he got back to his feet, he coasted back towards Bortuzzo again and when contact was made, once again he went down like a ton of bricks, ending up in Bortuzzo getting the gate for a cross check and Lindell going for embellishment.

How did Bortuzzo celebrate? By giving Lindell a real shot after the whistle.

NHL players tend to despise any player who actively looks for an opportunity to dive to draw a penalty. I guess Bortuzzo was looking at it like "if I'm going to the box, I may as earn it".