I feel this way sometimes about recycling. I am very diligent about it, washing out my cans and jars, separating my plastics. And then I watch my neighbour fill our bin with plastic bottles, last-season clothes and uneaten food.
Recycling is mostly a scam. Most municipalities don't bother separating out the plastics and papers that would be recyclable, decontaminating them, etc. because it would be too expensive. They just trash them.
At least you and your neighbor are operating on the same scale. Don't stop those individual choices but more members of the populace making those choices is not how the problem gets fixed, businesses and whole industries are the real culprits.
