We’ve been receiving quite a few messages about this and I just wanted to take the time to clarify how the public event stream is supposed to operate. This is a “public” events stream is a data firehouse of all public data on our platform. It does not include private event data or data that has a special tag in its function.
This is normal and expected behavior.
Video below of the normal behavior 
Thanks for clarifying this! I’ve been using the cloud pubsub system for ages now and this somehow hadn’t sunk in. (Thankfully I haven’t published anything too embarrassing!)
Are public and private events in a different namespaces? In other words, if I subscribed to a “temperature” event I publish privately, I shouldn’t expect to get a zillion unrelated public sensor readings, right?
if you issue a particle subscribe temperature then you will get all public temperature data.
I generally recommend using a more descript/secret namespace like
particle subscribe temp389Ohio or just something out of the ordinary
As mentioned in the docs:
“You can listen to events published only by your own devices by adding a MY_DEVICES constant.”
https://docs.particle.io/reference/firmware/photon/#particle-subscribe-
There’s something similar for the command line, also documented:
https://docs.particle.io/reference/cli/#particle-subscribe
Thanks @Moors7! Somehow, I always miss a critical piece of documentation no matter how many times I comb through it.