I have found prescription medication in other peoples medicine cabinets, and taken some without telling them. (Hydrocodone, xanax, valium, ambien)
My brother had a hydrocodone and clonazepam prescriptions that were nearly two years old, so I took them. He was not using them so no need to let them go to waste.
I found three unopened beers in front of a school a few months ago, and took them.
I have found 3 unopened packs of cigarettes and an opened one with about half of them left. I smoked those. I stole one pack out of my 15 year old nephews backpack.