A disaster waiting to happen.

Okay, I'm disabled, but I'm not stupid. My roommate is getting ready to spray paint a house fan vent. [Found only on areas where the weather hovers around mid triple digits. ] Not painting with a brush. With spray paint in a spray paint can. No mention of cleaning the surface. No mention of unscrewing it and doing this in the garage or outside. Just spray painting it where it is. No drop cloth, no plastic or old sheets to protect the wall. No goggles to protect her eyes, be cause this is on the ceiling. Yes I asked, she's not even taping the area just around the vent. I am practicing my [not gonna say "I told you so" . ] ((note: that pounding noise you hear is my head against the wall)) this ain't gonna end well