Cox does this as well. I was recently staying a hotel and they were doing something similar prompting me to rate my experience. I started thinking about standards to make this kind of thing impossible... Ultimately TLS solves this issue. We should be bullish on making TLS standard.
I agree it is "pretty much standard" but the ISPs and other network providers are not doing this with TLS traffic. They are only injecting the scripts in HTTP requests without TLS, at least in my experience.
