intefererence is possible if not unlikely
"Ofcom claims the pirate stations interfere with air traffic control and fire brigade radios, ... ...
Air traffic systems are closer to the FM band (between 108 and 137MHz), so interference is possible, if unlikely."
without the technical speil it's just summed up in two words, side bands...
transmissions aren't just on a single frequency, there are other frequencies that are also transmitted, these side bands are different frequencies that decay in power the further they get away from the main broadcast frequency...
since 108 is extremly close to the consumer airspace of FM radio, unmonitored unlicensed stations transmitting on whatever frequency they like it not just "possible if not unlikey", it's "possible and highly likely"...
also if you set up a radio station and pay for your airspace, you've bought spectrum, that's yours to transmit on, why should you have to put up with people stealing your airspace and degrading the commercial service that you are offering?
@dave bell...
yes another pirates vs. ninjas debate... just what the internet needs :)