When my sister and my female family members goes, we only have one driver and they do not go on anybody else car, except his. Him and him only, and he is a family member as well!It's like @TekNiKo said, my aunt from the UK moved back to Xamar and her Bajjaj driver was my half brother's first cousin who someone known. You only travel with certified drivers who are close family. There was one time a group of 4 men came out of salaada dhuhrka and then robbed a guy who also prayed in the masjid
They don't even use bajjajs at all, and once they go home, nobody comes in or out and the security guards are all Family members or clan member as well!