I have already posted the reasons there are for concern.  Drug addicts are more likely to steal, which puts customer funds at risk.  Drug addicts are more likely to miss work, which puts the business at risk when the owner is the one with the drug problem.  Drug use damages the brain and the ability to think, which makes it more likely an owner might make bad decisions.  Drug users face risk of arrest which could threaten the existence of the business if the owner is in jail.  Driving while under the influence also risk arrest as well as a likely chance of death of the owner.  These are all facts any potential investor should be aware of. 

Dank's personal religious beliefs do not carry such risks, and are thus off topic due to the lack of relevance to the business.