Florida hasn't yet outlawed talking on the phone while driving, so for two years, Humphreys carried a powerful cellphone jammer in his car during the daily commute to work.
The jammer crippled cell reception for those around him along a stretch of Interstate 4.
Humphreys' goal was likely to prevent nearby motorists from placing a call, sending a text, or checking their Facebook feed while driving.
But as the FCC angrily points out, he also may have unknowingly disrupted "first-responder communications" such as 911 calls.
Cell jammers are illegal in the United States — largely because it's easy for them to get in the way of emergency calls.
Instead, MetroPCS eventually noticed that reception was flatlining along the same point of I-4 twice each day.
Once the FCC became aware of the situation, it used "sophisticated interference detection techniques" to track the problem down to Humphreys and his Toyota Highlander. »
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