Ask HN: Ads-B Tracking PD Helicopters in South SF Bay Area

Any ADS-B heads in the SF Bay Area can help me track the answer down.

A couple months ago if I heard the ghetto bird flying overhead I could jump on adsbexchange.com and find the details. It was always a tail number ending in PD.

Now I can't, for about the last 2 months, see that info anymore. It's clearly PD overhead, but I just see MLAT info now. Like this. https://globe.adsbexchange.com/?icao=~2b093f

I know buzzfeed put out that article about tracking military/police flights in June, which drew a lot of attention to this info. Even though it had been available for a while by then.

Why did this info only recently get censored? Any change in law or is this just someone finally realizing the info was there and squashing it?