"Hay guyz, just wondering if you would like me to go stalk that guy who's most likely connected to organized crime wielding fuck-off money and hurty things."
This is going to end well.
From my POV, I'd rather it end with my making some money out of the deal and knowing that I wouldn't be "stalking". I'm a lay person, but like many libertarian-minded people, I'm quite familiar with the extent of privacy laws and how they apply to both the government and to private individuals.
I have the ability and means to execute something like this in a professional way.