Fine line between wear/tear and abuse?

[Sam Leon]

How do you draw the line between wear and tear vs just excessive force & abuse?

Example, if within a two month period you had the microwave oven door handle broken off, refrigerator door handle broken off, the exterior front door hinge pulled off (which happens when you swing open the door to 240 degrees when it hits the wall but if you put your body into it bang bang bang it may pull loose the hinge screws.  The sink cabinet hinges are also loose to the point where they won't shut tight.

Some people open and close the car doors, some people kick open their car door, get out, and close the door with a forceful butt bump.

Where is that line?  as a landlord is there a way to reasonably define that line?