no more data cap
Why? The cable modem will be able to figure out what traffic is coming from the home vs. coming via the public wifi, and can count those separately. (And can do different speed shaping and prioritization).
subscriber cancels service
Same question. If the cable modem is plugged in, they just need to block the ethernet and "personal" SSID, leaving the "public" SSID operational.
Cookie tracking means you're getting spammed with ads you DO want, instead of the ads you don't want.
If only they weren't lying. I don't want _any_ of the ads.
but why shouldn't I get to make that decision
Because your "reasoned" decision apparently doesn't take into account the threat you now represent to everybody else.