To add some sanity to this thread, I regularly have shops like Meineke, or even Wal Mart change my oil, but I stay with the car and watch. It's not rocket science, it's a simple oil change. I do ask what filters they use, and if they will supply Mobil 1 (which I use). If I am not satisfied with the filter, I bring my own.
I've been doing this for the past 25 years (over 2 million kilometers) with only one bad experience. At a new Wal Mart once, the boy started to add the wrong oil. I saw this, brought it to their attention, the engine was drained, and refilled with Mobil 1.
IF you find the odd unscrupulous operator and he presents you with a list of "must do" items, just ignore it and report him to the Better Business Bureau in your community.