My city has a pretty nice park in it. This past spring, they spent a ton of money installing almost two dozen new tennis courts.
I haven't played tennis in years, but the wife and I have been trying to be more active and get in shape. So we saw that there were all these new courts, and they were usually pretty empty, so why not? We bought a couple of cheap racquets and some balls, and drove over to the park.
There, we discovered that the courts were behind a pin-code locked gate. A big sign said, "Open to the public 5AM to 9PM" and had a QR code under it. I'm abnormally paranoid about QR codes posted in unmonitored public spaces, so I went to the city's website and clicked around until I find out what was going on: you need to scan the code to go to a website to reserve a court for a certain time slot, and then they will email you with a unique code for the gate five minutes before your reservation.
This is, on its own, an insane system. The only upside I could come up with is that, if you save the link and book in advance, you'll always be sure to have a court to use. But, again, there's nearly two dozen of them and I've never seen more than three in use at a time.
But we were there, we had our equipment, so I caved and began signing up for this bullshit. They had me create a username and password, and finally I was able to select a court, select a time, and click "reserve."
Except that when I clicked, it took me to another website to make another login. This was not a .gov, but some private company that I guess the city contracted with? And to make a login there, they needed my email, my phone number, my DOB, my zip code, and even my gender.
So to play a game on a public court, in a public park, in a city that I pay taxes to, I need to surrender tons of personal identifying information to a third party? Fucking why?! Who thought this was a good idea? What part of the community does this serve?
So, yeah, I'm taking the tennis stuff back to the store, I guess, and the spouse and I will need to find another hobby.
I disagree with the premise of ensuring it's only accessible to people who are "supposed to be using it." This is a public park. The public is supposed to be using it. By forcing registration, they're limiting access to just people who have smart phones and are savvy enough to navigate the registration hoops. Children and old people aren't allowed to play tennis, I guess?
If the big tangible benefit is resolving scheduling disputes, this is an over-engineered solution. There could be a sign-up board or book right by the entrance. Hell, they could station a park worker there during peak hours, just like they do for the swimming pool there.
And data collection absolutely is an issue on its own. Especially when it's tied to a random QR code on a sign. A malicious actor could make their own copycat portal and start stealing IDs with the amount of information these guys are asking for. And that's to say nothing of what the actual company may be doing with it.