Doesn't matter what machine you're using if your ISP e.g. Comcast is injecting ads into the web pages you visit!
Luckily this is not [yet] an issue where I live. I am an extremely deliberate consumer, though. I have evaluated competition and terminated contracts for far less than this.
Just because others are doing it, does not make it right.
Never purchased a Lenovo but I was bent on using one for my next machine. No longer. Their lies about it "not being a risk" have put the affected customers at immense risk.