This actually brings up a point that was made in a cambridge analytica post. If personal information is deleted after it has already trained a dimension-reducin

This actually brings up a point that was made in a cambridge analytica post. If personal information is deleted after it has already trained a dimension-reducing model, is it really deleted? If Google and Facebook see everything because of oauth, we can ask them what data they have and tell them to delete it, but they won't be deleting whatever models they've been training about us.