Do car thieves use GPS blockers?

Some German drivers are also believed to use such jammers to try to evade GPS based road tolls, which were introduced for trucks in 2005. There have also been robberies in Russia. This kind of jammer is used for GPS systems and mobile phones on trucks to prevent drivers from contacting the authorities.
This more powerful jammer can provide multiple uses for criminal gangs. They will work within a range of tens of kilometers, so drug gangs may use them to disrupt the navigation at the Thames estuary if they are transporting goods and do not want their opponents to track them down.