The mapping of addresses doesn’t bother me so much. My house number is public information— that’s why we put them on the outside of the house— and is easily located by anyone with access to Google maps. sounds like they are doing this to be able to plot the data they get, graphically on GIS maps.
What I think IS very troubling is this bidness of moving the Census to the direct control of the White House. The obvious objective, seems to me, is to then allow the President to personally re-district Congress however he pleases. The maps will help that greatly.
Mapping the data isn’t the problem. It’s actually an interesting and probably useful way to analyze data. It’s what they want to DO with the data that’s scary.
Couple this data with voter registration lists (esp. party affiliation) and you could gerrymander some very useful district maps.
Couple this data with web-forum postings, handles, and IP address data, and you could easily correlate a pretty effective “who needs indoctrination” list.