Convictcharlie... as a chemistry teacher I have to address a couple of things you mentioned here. Not trying to offend, so I apologize in advance if I do.
when you say "molecule", by definition that would be a non-living particle. Your statement about taking away oxygen in the air so they can't breathe applies to the living bacterial cells that live and grow on our sweaty places and stay in our clothing. They produce the molecules that we associate with bad smells.
Atmospheric oxygen that we breathe is O2That's 2 oxygen atoms sharing electrons, kind of like holding hands or close dancing. Ozone is O3 ... That would be 3 oxygen atoms sharing electrons.
What people don't realize (we take it for granted that oxygen is good for us and therefore harmless) is that a single oxygen atom is HIGHLY reactive. That's why things oxidize, or rust (for iron). Ever leaned up against an aluminum sided house and gotten covered with white dust? That's aluminum oxide, or Al2O3. My point being that Oxygen atoms sort of attack and force other atoms to give up electrons so they can be stable. The oxygen we breathe has already gotten to be very stable by sharing electrons with 1 other O atom. When they form that ozone situation, they are much less stable. Therefore, when ozone comes into contact with other molecules, it will split apart and attack the individual atoms of the other molecules causing them to break apart.
Smell is caused by the specific shapes that molecules have. There are actually tiny little receptors in noses that accept molecules and send a message to the brain about what that molecule smells like (kind of like a lock and key situation, different molecules/keys trigger different signals/open different locks) When ozone molecules come into contact with these "scent molecules", they basically cause them to degrade into smaller, simpler molecules that do not trigger the same scent signals. Kind of lock grinding your key into a different shape. It might open a lock somewhere, but not the one it was designed to open.
You're pretty much right on about why too much ozone kills you. Too much ozone means not enough of the atmospheric O2 that we require to breathe... you basically suffocate
