This episode takes place right around Halloween, so Bay and Daphne would have already turned 17, as their birthday is October 22. Yet Angelo refers to Daphne as still 16 when questioning her relationship with Jeff.
Bay and her passengers are regularly shown not wearing seatbelts, yet given the wild paint job she and Zarra recently gave the vehicle, it stretches believe that she would not attract police attention during the long drive to the border and be pulled over.
For all of Bay's worry over getting back Zarra's bail money, she had no problem helping Zarra leave the country and no doubt miss whatever hearings were scheduled, thus forfeiting the bail.