Yeah, not that big of a deal haha could have happened at a party anywhere in the world.
I wouldn't base suggesting he not go on videos of the event, more if he and friends have enough sense to safely handle a large scale party (if they've never been to one before). I've been to some parties in Negril unrelated to Dream that were just as, if not more, busy and wild than some of the Dream parties. They really make the most of marketing it, most of the videos are filmed to make it look as outrageous and busy as possible. Most of the venues are quite large, the crowd spreads out and they end up with slightly slower areas that they don't tend to show in videos. An alternative could be only going to a few parties instead of the whole thing. Doing it all is pretty exhausting anyways, he might need a vacation afterwards!