Does this mean that the cops can’t camp out in a bar’s parking lot at 2am, watching drunks walk to their cars? Seems like they’re predicting that bar parking l

Does this mean that the cops can’t camp out in a bar’s parking lot at 2am, watching drunks walk to their cars? Seems like they’re predicting that bar parking lots routinely have drunk drivers at 2am.... If a resident gets a drunk driving ticket due to the above strategy, can their conviction get dismissed because cops weren’t patrolling using a Cryptographically secure random number generator? Please let me know when a lawyer first uses that defense. Always looking for a good laugh.