Ok, sorry to put it this way, but aren't you exaggerating a bit? I just don't think that something bad could happen to ypu or your wife because of a review. But maybe I'm wrong. Are the car-rental people real thugs? Well, if they are, do not hesitate to go to the police with every proof you have. You can contact a district police officer (responsible for your particular district) and get him interested in this situation. They may say "we'll look into it" (and do v.little) but I wouldn't assume it granted. My experiences with public officers etc. have always been quite positive. So just to feel safer (as it all comes down to this actually) - go to the police, at least they'll know about this situation and would react appropirately if anything more happened.
Yes, law graduates go around good neighborhoods burglarizing computer disks and also rummaging through trashbins to find hardcopy documents - and then it like a Hollywood thrill'a
Me be a Thrillseeka, I give my real address , DOB, Cell number on all social networking.
*But Realistically, as other Poles, I stay clear of courts and do not welcome with ease any kind of activities which lead to having to be calling the Courts. the courts suck arss