Danger...I get this a lot.  I take it in stride though.  Just some kids or simply non porshe owners wanting to hear the box over 5k rpms.  And as addicted to the sound I am, personally I can't blame them.  
 
  
Coming home one night on the freeway, I get challenged by a VW.  Dropped in 4th let him hear the howl.  Upshift to 5th let him here some more and shut it down.  After he caught up, he gave me a big thumbs up and went on his way.  The guy probably has more respect for the car if he didn't before.  What I don't get is the guy in the Caddy suburban trying to race me at the stop light.  

  He's the guy thats probably saying....couldn't afford a 911.  Either way, another smh boxster grin story.  Love this car.