She snatched the money, muttered something about “renters ruining the vibe,” and marched away. But as I watched her go, I realized she needed a lesson in how “unsolicited favors” actually worked.

A few days later, I went to the local hardware store and bought several gallons of the cheapest, most industrial-strength, neon-orange “Safety Marking” paint I could find. I also stopped by the garden center and picked up a massive bag of organic fertilizer—the kind made from fermented fish guts. It smelled like a whale had died in a dumpster.