There's a really easy solution to this. Don't buy junk you don't need sold by people who don't care. Who convinced you you needed it in the first place? That's probably a bigger source of noise pollution...
The "sold by people who don't care" is a bit of a problem. How do I know they care? I'm a software engineer, I'm much more technical than most people around me. I have a hard time picking my way through that - is that childs toy bluetooth or wifi, with whom does it communicate what, how do they handle the data that they may or may not gather. Is it using a secure protocol to do so? How am I going to explain that to my less technical friends that don't have my knowledge? How can I educate them or how can they self-educate to a point where they can make a conscious decision about which toy is trustworthy? Heck, Miele had their dishwasher hacked, generalize for all IoT devices.
I want (in fact, I need, because of my sensitivity to CO2 levels) a nicely working CO2 sensor in my room. I tried a few cheaper options, but they didn't work as reliably. I did my research, and it was either NetAtmo or some industrial-grade sensors, more expensive and ugly.
I love the idea that you have any concept at all about whether or not someone needs an item. We're all glad you aren't materialistic, but we don't really care about your opinions on other people's spending habits