Collecting vast swaths of data to know where I live and work, which are literally the first two questions on my income tax return btw, is very different from knowing the name of every person I've been near and the location where I'm near them. We've all seen how these "geofence warrants" have gone -- a lot of innocent people being dragged through the court system for absolutely no reason.

If we do end up implementing a centralized contact tracing system, the results will be very interesting. I would love to know the name and location of every lobbyist that my elected representatives have met with, and I'm sure that in the name of public health they won't make any efforts to thwart this tracking.