It is unfortunate realtors are compared to big tobacco.

But at the end of the day this will ultimately become big biz and go the way of the alcohol and tobacco industry with proper packaging, marketing, advertising and positioning all vying for market share. 

Tim read the response i posted to jawsette but lets just do a bried overview, the products that supported america when it was brand new tobacco, rice, indigo, sugar, then later cotton in the south who worked the fields to grow those crops.

Once enough calls pile up, the business has now established itself as a nuisance.Do the police ever use undercover officers to try to buy alcohol and tobacco with invalid identification?

I always carry a can of axe aerosol in the van, saved my butt more times than I can count haha

"No one may take any of the following actions based on race, color, national origin, religion, sex, familial status or handicap:" Tobacco use isn't a protected category(Neither is poor dress sense, bad hygene, stupidity, or being a Republican 8^)

Here's my procedure for Tobacco Smoke Damage: 1. 

The ceiling and walls were yellow of tobacco smoke !

Either way, we turned it in to a flip, and I'm happy we did.Getting Rid of Cigar/Cigarette/Tobacco Smoke:1) Ozone Generator: You absolutely NEED an Ozone Generator.

It's better than Kilz and I wish I had known about it when I did mine. http://www.biggerpockets.com/forums/67/topics/78889-smoker-rehab-keys-to-success-with-tobacco-smoke--before-after-picshttp://www.biggerpockets.com/renewsblog/2012/11/05/getting-rid-tough-odors/I know for pet odors there are some enzyme neutralizers, you may want to get some for the sub floor under the carpet areas help with that.http://www.biggerpockets.com/forums/67/topics/74253-cat-pee-in-concreteThe biggest cheap first step is to just literally wash everything down.