I gotta say, it's incredibly inconsiderate and thoughtless to publish the real time location of a bunch of public safety officers in an individually identifiable way. I understand the sentiment, and I appreciate the hackery... but you put these people at risk today. You need to think much more carefully about how you approach things like this in the future.
I disagree. There should be no expectation of privacy for any public officer. Things like this website, body cameras, and FOIA requests are all for the public good. Expose corruption and keep everyone safer with a little accountability.
It's worth noting that SF Parking Control Officers aren't "police" by most any definition. They're not sworn, and they don't qualify as peace officers under California law. They can't execute warrants, make arrests, or carry firearms, etc. They work under the San Francisco Municipal Transportation Agency (SFMTA), not the SFPD.
Their enforcement powers are limited to issuing parking citations, ordering tows, and directing traffic. About the only thing they share with actual police is the word "Officer" in the job title. Tracking these folks is about equivalent to tracking individual USPS employees.