At my mother's house we had an English pointer who was so excited when people came to the door that he broke the four bottom panes in the door that had 16 narrow panes set in it. Those were repaired with reinforced glass. We got in the habit of catching him by the collar and pushing him into the upstairs stairwell and closing that door if anyone came to the door.
Two or three beefy men came to the door one day and when Mom answered it they told her they were from some church or other. When she told them she wasn't interested, the guy closest to the door actually stuck his foot in. I walked over to the stairwell and let the dog out.