This stuff happens, it's not a myth (c) Allen Raymond

Mr. Raymond went to jail for his participation in a voting scandal in New Hampshire in 2002.  He was paid over $15,000 to jam phone lines.  Mr. Raymond 'jammed lines' by hiring a small Idaho telemarketing company to incessantly make hang up phone calls to six phone lines in New Hampshire.  Five of the phone lines being jammed were being used by Democrats to get out the vote, and the sixth was being used by Manchester Firefighters' Union which offers rides to the polling booths.  

....Just urging you to be careful my fellow voters.  The tricksters are pulling out all the stops in '08.