Oh, and the magic words anytime you're forced to take it to a disservice center...
*** NO INSPECTION PLEASE ***
But yeah, I hear these unnecessary repair stories all the time. They recently got a coworker to buy a new braking system he didn't need because the caliper had a little rust on it. Of course the junk they replaced it with, rusted over in a matter of weeks. It was at that point he knew he'd "been had".
When I took my current vehicle in to get an alignment after the dealer unnecessarily replaced good parts under warranty (but didn't do an alignment) the guy yanked my valve stem, compromising the seal, resulting with a slow leak. I forgot to say the magic words. Took the loose wheel and replacement valve stem to a tire shop and the guy must've realized what happened because he didn't want to charge anything for the valve stem replacement.
Prior vehicle I took it in simply to get new tires and they tried to sell me an all-new suspension even though the existing OEM suspension was perfectly fine.
One shop sold my Mom an all-new suspension even though all it needed was an alignment. Rode unusually rough. (I told her beforehand what it likely needed but didn't listen.) Got it back with the same issue. The vehicle sat noticeably higher so I knew they really did swap the suspension. She took it to the dealer and all they did was, an alignment.
Got way more stories from people I know, as well as myself. Oh, then there was that time I caught a mechanic joy-riding around the parking lot in my prior car...