My "fave" experience was being told by a distributor/dealer for a pricey room acoustics treatment that my room ABSOLUTELY needed dozens of these panels despite my protestations that my base sound was hugely acceptable, and him not having visited the room. And that my choice in gear was "poor".
I actually had a mini panic attack on the day he was due to visit. Was I worried he was indeed right? Or did I not want a humourless egocentric lording it in my own property?
Suffice to say he hasn't got a sniff of my cash.
If this is true, this guy can't be much of an audio consultant!