This is obviously a bad idea, private companies or individuals having the power to arrest people because they want to? Look at the recent few years of history in the US where multiple experienced and distinguished (at least by resume), members of the us govt, senators, reps, tried to subvert an elections, dozens of lawyers told them it was illegal, we have their email and texts telling them. That group still acted to do many illegal actions, lie about it, tried to cover it up. And they still deny any problems with their behavior and choices.

Private companies having arrest rights is just a nonstarter of an idea (putting it kindly).