Honestly not the weirdest behavior you'd see in campus, and could almost be wholesome. Guy's down on the ground interacting with his dog; what's wrong with that? Also: it's at night - could they see he was actually eating grass, or did it look like he was just playing with his dog?
Also also: college campus... night... couple sitting on a bench... "sitting." College couples never only sit on secluded benches in the dark. OP probably interrupted a handy.
I once owned a bunch of WiFi connected devices. One day I inspected my router logs and found out that they were all making calls to a bunch of services that weren't the vendor - things like Google, and Facebook.
WiFi connected devices require connecting to a router; in most homes, this is going to be one that's also connected to the internet - most people aren't going to buy a second router just for their smart home, or set up a disconnected second LAN on their one router. And nearly all of these devices come with an app, which talks to the device through an external service (I'm looking at you, Honeywell, and you, Rainbird). This is a privacy shit-show. WiFi is a terrible option for smart home devices.
ZigBee, well, I haven't had any luck with it - pairing problems which are certainly just a learning curve in my part and not an issue with the protocol. I chose ZWave myself because I read about the size and range limitations of ZigBee technology, versus ZWave, but honestly I could have gone either way. Back then, there was no appreciable price difference in devices. Most hubs support both, though, and I can't see why I wouldn't mix them (other than I need to figure out how to get ZigBee to work).
In any case, low-power BT, ZigBee, or Zwave are all options, whereas I will not allow more WiFi smart devices in my house. I'm stuck with Honeywell and Rainbird, for... reasons... but that's it. I don't need to be poking more holes in my LAN security.