> most residential IP addresses are dynamic In theory perhaps, but in practical terms your mileage may vary widely. I'm not sure about the rest of the USA, but

> most residential IP addresses are dynamic In theory perhaps, but in practical terms your mileage may vary widely. I'm not sure about the rest of the USA, but in the Chicago area Comcast appears to have pretty much abandoned rotating dynamically-allocated IPs, and I suspect many other carriers have something similar. On the other hand, experience last year with attempting to whitelist a remote user living in Germany showed that at least one ISP there appears to rotate home IPs every few days.