Drug use is not OK for many reasons, just as tobacco use is not okay. It's bad for you health, addictive, expensive, and effectively useless. It also makes people more likely to get hurt by doing stupid things like operating machinery. Concentrations of drug use will have a serious negative impact on the local community by draining it's money (people will be paying for drugs rather than for local services, etc), making the people unhealthy, putting a bad name on the community, repelling people from moving in, and making it a worse place to do any other business, due to the drainage of money.