If you think there is no risk, why are you asking the question? If there is risk, why not use a VPN to mitigate that? It seems to be a common theme with private trackers, for there to be some sort of implied safety. Private trackers are higher up the tree than public, no problem. You'll all be fine right upto the point that you're not. Of those people using private trackers that will inevitably be targeted by a multi billion dollar industry, do you want to be the low hanging fruit?