It's not the smoke that lingers is it? It's the chemicals in the smoke that get into furniture, curtains, carpets etc that you can smell. Plus cig burns, nicotine stains and all the crap that comes with it. Who the hell would want to move into a house with all that? Scratch that, some people don't have a choice where they live, so how much of a selfish **** would you have to be to mistreat a house that isn't yours in the knowledge that some poor sod would have to occupy it after you?
If you live in a council house, it isn't your house, ergo, you can't do what you want with it. Otherwise nobody would bother getting a mortgage and everybody would just get council housing. If they tell you not to smoke, then you shouldn't. I mean how hard is it to go outside? Council houses aren't that big anyway, it's not like you have to walk a mile to the backdoor.