And how much power does it use?

But risking legal action or armed retaliation?

If you just run dhcpd on eth0 would that be enough? I’m assuming no based on your answer.

From the article:

At least seven states with a total of about 35 million registered voters have publicly reported the results of running their voter rolls through the system. Those searches have identified roughly 4,200 people — about 0.01% of registered voters — as noncitizens. This aligns with previous findings that noncitizens rarely register to vote.