This is not a general indictment of all travelers who invite virtual strangers into their personal space and, by doing so, into the personal space of others but........
We are incredibly trusting of strangers more so on our brief visits to Jamaica than we are otherwise prone to do so at home. Now, I know some will say.... "I meet people all the time where I live and invite them into my home" but I would counter that a different set of "rules of engagement" are enforced and used before you invite them into the house where you permanently reside.
Your new "best friends" are developed from limited information and a "gut feeling" and for some reason that seems to trump common sense that you probably possess at home.
Remember, the hotel owners LIVE with these "new best friends" 24/7 and are much better judges of their quality and character than your gut. It isn't because the less friendly owners towards the local Jamaicans are necessarily biased towards their fellow occupants of Negril without some good reasons.
I agree with Jitterbug on this that I don't want other people's new "best friends" roaming around where my possessions are kept during my stay at a hotel. I appreciate their efforts in providing me security and I trust them a little more than my "gut feeling" as to who is a good person and who might be there to take advantage of me.
Let me just say that I live in rural Jamaica for much of the year and when I travel, I stay mostly in Jamaican homes and/or visitor-friendly places so I personally have no problem with any of this. But, if I were a "newby" to Jamaica and got a room in a place next to the room of someone who had a lot of their new "best friends" roaming around my door, I would certainly feel my personal space was being violated and the money I paid for the privilege to stay there was not paying for what i had bargained for.
Peace and Guidance.