Quote:
it's vague enough for advertising
Sweetie, the internet has gone so far as to personalize the advertisement you receive in the mail at home.
The internet knows what you want or need before you do yourself.
It's called cookies.
It remembers everything you do on the internet and will personalize anything to what you visit most.
Vague captcha questions aren't doing anything that would in any way violate your privacy, and if you feel this is bad already then you're not safe on the internet.