To me there is a difference between having a chat with a mate about bikes or whatever and auctions and some dunce registering to DL and bumping a bid thinking they are 'helping', to someone using same laptop or the like, using privatetunnel etc and specifically setting out to defraud and avoid being caught.
I could be reading it wrong but your post does hint more at the idiot-trying-to-help rather than the latter more calculated approach, but using privatetunnel is quite precise.
Can you give clarity? No reason to, just me being nosey and wondering