For instance, BlaBlaCar  is the largest carpooling network in Europe. It is a service focused on long distance trips and uses social networks for registration and feedback and as an enabler of real connections between users. The biggest carpooling service in the United States is ZimRide , where payments are made through credit card account and PayPal. The main system to build trust in all of these platforms is based on user-given points. However, ignoring this security system is quite easy because users who get a negative score, can create a new profile with new credentials and no points.