Gizmodo, a technology news source, investigated GPS jammer and found that they were "dangerous, cheap and easy to obtain and use." They are also illegal, but this will not prevent people including drivers from using them. GPS scramblers will not only harm your business, but also destroy emergency frequencies used by 9-1-1, ambulance, fire and police departments. GPS signal jammers even interrupted aircraft navigation.
The use of GPS jamming devices may be more widespread than expected. According to a study conducted in the UK in 2012 (called the Sentinel project), there are 50 to 450 GPS tracker failures every day. Fleet drivers and truck drivers are responsible for 90% of such cases. Another study conducted by Rohde & Schwarz in 2014 found that about one-third of trucks on major U.S. highways transmit at the same frequency as GPS-suggesting that these trucks may use GPS signals Jammer.