There is also increased risk of fire.The damage caused by cigarette smoking (and smoking of other substances indoors) is enormous.

I put in my requirements that they must have a 640 credit score and at least $xx,xxx of income(35x monthly rent) and non-smoker, and so on.  

Is he going to fall asleep with a cigarette in his mouth while stoned out of his mind and burn my house down?

I pre-screen my tenants by saying "Total household income has to be 3x rent, no pets, smokers or evictions."

It looks like they were hanging out there for a while, smoking cigarettes, using the bathroom, going through things.  

The boyfriend had stored a flammable material he "said" he used to clean his shoes in the upper cabinet followed by a ashtray with a cigarette butt before going to bed with the girlfriend that night. 

If you don't specify who your target market is and what browsers they are going to be using you might have a product turned in that only works with MAC Safari and None of your intended clients have that WEB Products AGE FASTER Than smokers who sun burn If you don't have a plan to make money from this thing the motivation to keep it going will LOOSE the APPEAL.THERE ARE NO CODING STANDARDS !!!!!!

It also weeds out the "Lookie-Lous:" folks who can't afford it, bad background/credit, smokers, etc.

No pets....non-smokers.....and a large security deposit.

Non smoker, no pets, makes 70K a year.