The plan here is to do a good job of encouraging people to criticize. The good part is the punching and punching bag. Hitting people would, of course, be a brutal display of aggressive violence. Perforating the quilted bag is arguably more acceptable.
The bags come with an interesting note. The lyrics show that a small amount of stress and frustration is normal. Letting stress and frustration flow through an outlet is a natural way to deal with both.
Generic punching bags are an atypical way to treat an anxious state of mind.
Hopefully anyone who chooses to hit the punching bag takes an introductory boxing lesson first. Not hitting the punching bag in the right way can hurt your hand. Reducing stress is good, but suffering from an injury is not!