I completely agree with you. Not everyone would risk getting into the first car near the airport. And there are some cab services that it is better not to use them. I can advise you chauffeur service frankfurt. I usually use their services. It may be more expensive than the cost of a cab, but my life and my safety is much more expensive to me than any money. Moreover, if you're not just a tourist and came to the business meetings it will suit you much more. Happy to help if of course it will help you. Good luck with your travels. And it is always better to plan in advance for such moments, so that then in a panic not to rush on everything in a row just to be faster.