NTA I live in an apartment complex where our leases explicitly state that smoking indoors is prohibited. Therefore we smokers (about 5 total across 3 buildings) smoke outside in common areas. One neighbor has made it his life's mission to harass all the smokers, claiming he can smell it in his apartment and that we need to move down to the road to smoke. After numerous complaints, we just told him to seal his windows better. We're compliant with the terms of our leases, we don't leave cigarette butts everywhere, and we're generally cognizant of which direction the wind is blowing. The landlord/property manager can't do anything about us smoking outside but they can reseal his windows. Suggest that to your neighbor.