Whynot,
You can do whatever you want. But you also have to be willing to face the consequences of your actions.
Living here, I can assure you that most of the over 6000 residents are as law abiding as they can be. In fact, that is why any community works, because most people are as law abiding as possible.
But life in Negril is about as different from life in Las Vegas as I can imagine. Vegas has 100 times the population of Negril.
Trying to compare a developing island country's small tourist destination to the "dolphins in the desert" mega resort city of Las Vegas is counter productive. Negril was having it's very first tourists when the famous Welcome to Fabulous Las Vegas sign was being erected. Vegas already had tourism history.
But in Negril, you can light up most places where smoking cigarettes is not banned and the worst you can get is a j$500 ticket. No police record. It is not the same for Vegas.
Vegas and the ganja laws are more "what you buy in Vegas, you can't use in Vegas". If you do and get caught, you will end up with a police record. And be us$600 in the hole.
Hear or read it from the dispensary operators in Vegas. From July 31st, an NPR interview, "Tourists Buying Marijuana In Las Vegas Have Nowhere To Smoke It In Las Vegas"
http://www.npr.org/2017/07/31/540652...t-in-las-vegas
Why not come to Negril for no problems...
