How can you tell if this is happening? If it's not showing ads, should I even care? It can't tell who I am if I've not logged into it or logged it into my wifi.

How can you tell if this is happening? If it's not showing ads, should I even care? It can't tell who I am if I've not logged into it or logged it into my wifi. It's surely bad for TVs to do this. But I'm not quite sure what the issue is if it has no idea who I am.