For collage dorms for example rarely charge based on electricity use. Some apartment complexes also include electricity as part of the rent.
Most people prioritize the longevity of the cards. Resale value is not negligible.
Those situations are rare. A student in a college dorm isn't going to be able to afford multiple GPUs for a mining rig, and if he's mining with one GPU, he's likely going to keep it when the crash comes rather than trying to sell it into a flooded market. Apartment mining is more believable, but even then power consumption is going to be an issue for them because of noise. They're also going to be vastly outnumbered (in terms of GPUs operated) by professional miners because most people don't have a few thousand dollars to drop on generating highly speculative assets.
This is false because miners often undervolt to achieve better efficiency. The popular GPU mining algorithms are all memory-bound, so you can undervolt your core clocks quite a bit and still get >95% of the original performance.