Story time!
I had started playing 4e at my FLGS for public play (first Encounters, later LFR). I was sat at a table with a DM I didn't know. The adventure was loosely based on "Beyond the Crystal Cave", though it really didn't do the module justice- but I digress.
We found ourselves in a villa, and the DM waxed poetically about how opulent the furnishings were, the crystal plates, the gold tableware, the massive oak table.
When we finished the encounter, I asked about treasure. DM: "Oh no, there's no treasure here."
"Uh huh. Ok guys, let's start grabbing all this stuff. We got tapestries, that carpet, the decorative plates..."
DM (horrified): "What are you doing?!"
"Collecting the treasure?"
The man was truly aghast at the idea that I was willing to take some dead Firbolg's furniture. He tried to say it was all just flavor text!
"Listen, if you're saying it's all an illusion and it's worthless, that's cool. But you went on and on about how valuable everything looked, so why can't we take it?"
He'd apparently never encountered starving D&D characters before!
For me, this was SOP, but for him, this was a nightmare made manifest, lol.