BBC detect people using iPlayer without a licence

BBC responds to claims about how it's going to detect people using iPlayer without a licence 

http://www.independent.co.uk/news/media/tv-radio/bbc-tv-detection-vans-data-private-wi-fi-networks-iplayer-licence-a7177396.html

• TV detection vans will capture data from private Wi-Fi networks
• £145 year licence 
• Already implemented
• Packet sniffing 

I believe this is the right thing for the BBC to do as its not fair as people don't have to pay the licence and are still able to watch BBC shows. However, there is a bigger issue that the BBC can't control alone when considering streaming and this is illegal streams. Although they can detect people using BBC iPlayer without a licence, there is no way of checking if someone is watching it through an illegal stream. Therefore, this will only create bigger problems as more people will move from watching iPlayer without having a TV licence to illegal free streams.