It will absolutely not reflect the average number of people who have the internet per state.

Well, you're wrong about what it will reflect. But, even with that, if the purpose of the poll was to find that fact out, then the poll would not be stupid.

You can't know whether something is stupid without knowing the purpose behind it. You only know the question. You don't know the use to which the answer will be put.

The purpose was that I just wanted to know how many people are in my state that were on HN. But I decided to ask about all the states.

This comment is foolish; it reflects a lack of understanding that reading, let alone engaging in HN, is not evenly distributed across all demographics with internet access.