i think i posted before, but do you really think people are living large by making $25 at a time every 6months by returning their old oil?
From my experience, the people who actually buy oil and change it themselves from walmart are typically blue collar laborers and actually honest.
The personality of the thief is someone who wouldn't be doing their own oil change to begin with. They're inherently lazy, they'd find a better way to get $25. If they're going to steal, they're going to steal something worth more than $25 for all the trouble that this is worth. If they're sociopaths doing this for luls, there are better targets then returning used motor oil.
This is all fear-mongering. Like illegal voters stuffing ballots, or tireshops selling you old tires.
Perhaps it happened maybe 1 time, and you heard a story on the internet that a friend of a friend had a problem, and now everyone thinks its some rampant problem.