Originally Posted by 905shmick
Nope. Bad idea. That's a recipe for broadcast and ARP storms.
I'm not sure how you can come to this conclusion.
Do you figure there is something magical about 254 machines where ARP traffic is fine, and then if you go up to, say 300 it won't be fine?
The only time I've seen a broadcast storm on a home network is when there are multiple paths and switches with no STP support. Specifically, wiring all your Sonos ZPs means you need gear that does STP properly.