Actually if you leave it where it fell, probably nobody will notice. Teach those companies that if they don't want their advertising cards thrown away they should fasten them securely inside the magazine. If you tuck the postcard back into the magazine then it will fall out again when the next person reads the magazine. You have wasted your time putting it back in and you will have wasted the time of the next person who then has to pick it up. Ok, here is a reason why you should put it back.
Misery loves company.
You're the kind of guy who, when the light turns green and someone is coming up behind you, you pause a moment for him to come to a complete stop behind you before you take off. Too Much Don't test batteries too often with their built in testers or the tester strip on the inside of the package. The battery tester uses up the battery's energy. Any kind of heating element consumes a lot of electricity. Even when battery makers say that their batteries last longer than the competition, they would love to sell you more batteries after you wear out the ones you have by doing tests.