If another same-model house has 10 occupants between grandma, grandpa, mom, dad, 4 kids, brother + wife + 2 kids in the same 5-6 bedroom house, why would zoning go out of their way to pick on 4-6 single professionals earning probably 250k+ jointly and being very "green" through their low-carbon living that's kicking their student debt in the teeth?

I'm based out of Edwardsville and my main areas of focus are Edwardsville, Glen Carbon, and Collinsville, also doing a little bit in Alton and Troy, IL.

It is written into all of our Leases that we will be doing quarterly (sometimes monthly) inspections.Our managers go around with a list to make sure smoke/carbon detectors are working, fire extinguishers are filled and the place is not potentially attracting vermin.We will also make a note of any damage or take pictures of potential Lease violations (smoking in the house, pets, more beds than occupants allowed, etc). 

That isn't on the National Code Book but on the the NFPA 72 (Which stands for National Fire Alarm and Signaling code) has a requirement that smokes have to be installed inside each bedroom (they say sleep rooms in case people transform other rooms into bedrooms) even for existing homes in addition to requiring them outside each sleeping area and then one on each level of the home that is a combo carbon/smoke (Additional smoke alarms are required for larger homes.)

Or when you have mf the state laws are more strict in terms of not only smoke dectors and carbon monoxide detectors.. but additional?

I would think you could make some headway being a specialist selling to those who are trying to create passive income from solar farms, carbon tax credits, etc.

Landlords need to keep a low profile to minimize their "landlord lottery" exposure, as we were discussing in the Carbon Monoxide thread.

-Change smoke and carbon monoxide detector batteries at move-in.

Is a "slip and fall" or a carbon monoxide leak or anything else of that nature, considered personal negligence on my part?

It looks like either oil or carbon staining.