How is there asymmetry of information? AFAIK there have been just as many tech advances in police accountability as well, such as the prevalence of body cams, or the ability to see these warrants as they are issued in real time on a police web site, etc. Of course there are other issues at play but I think you may have missed some things that are on the other side, it's very feasible for one person to track many police officers much in the same way that you describe. What would be questionable is if the police were trying to stop the public from doing so.