Yes, ironically the networks is more secure when people do what you did, as you reduce the number of devices exposed to the "broadcast/multicast storm babble",

Yes, ironically the networks is more secure when people do what you did, as you reduce the number of devices exposed to the "broadcast/multicast storm babble", and avoid contributing to it further. There's an awful lot of Spotify and Dropbox mDNS and local device discovery traffic that people never see until they run a network! Our "shadow IT" ended up so significant that we ended up able to directly request firewall changes and just send in the rule lines (in the correct format for the edge firewalls used) and they would be applied for us within the hour...