I wonder how this deals with corporate PCs. We have dozens of desktops running identically imaged copies of Windows/browser/plugins and all behind a single NAT

I wonder how this deals with corporate PCs. We have dozens of desktops running identically imaged copies of Windows/browser/plugins and all behind a single NATed IP. I imagine that they'd all look the same to one of these systems. If they start serving up adverts then perhaps I'll start seeing ads targeted at something one of my co-workers has been searching for. That could get interesting!