I blocked my two TVs from phoning home via my pihole. They are the two noisiest devices on my network, by leaps and bounds.
On a day of heavy usage, my phone and desktop may get ~2000 blocked requests combined. That’s high, but not unheard of. It just means I did a lot of browsing, with a lot of blocked ad requests. My TVs average somewhere around 7500 blocked requests per day, on days that I haven’t even turned them on. That’s an attempt to phone home every ~12 seconds. And it is much worse on days that I actually use them.