Unwritten Rules You Should Be Following

There are some unwritten rules everyone should follow.  What are they? Oh so you're  the culprit.

How about when you return someone's car, put gas in it, or leaving shopping carts in the middle of the parking lot, how about chewing gum with your mouth closed.

That's just the tip of the iceberg. Buzzfeed has come up with a bunch of them:

• If you are borrowing something repeatedly...buy one of your own.
• Use headphones, don't play music loud in public.
• Leave it in better condition that you found it.
• If you have to cancel time with a friend, it is your responsibility to reschedule.

Need more, as if we don't have enough rules already...see the complete list here.