"Diversion" refers to the many commercial establishments, especially in Las Vegas, that pay drivers to bring customers to their places. These could be gentlemen's clubs, massage parlors, wedding chapels, and others.
The simple fact is this: You cannot be diverted.
If you tell the driver that you want to go to a specific locale, he's not permitted to attempt to pressure you into going to another. If he does, he's simply trying to direct you to a place that pays him more than the one you want to go to.
Of course, if you ask for a recommendation, most cabbies will suggest a restaurant, nightclub, or attraction. Perhaps the establishment is paying a commission, perhaps not. If you ask and your driver directs you somewhere, that's one thing. But if you know where you want to go and your driver "has a better idea," just say no.
Being diverted by a cab driver is more than adequate cause for reporting him to the authorities.