No, because that would require linking online IDs to physical IDs and then explicitly tracking your activity, which would be a gross violation of user privacy,

No, because that would require linking online IDs to physical IDs and then explicitly tracking your activity, which would be a gross violation of user privacy, even under the guise of fighting crime. I'm not saying that law enforcement doesn't track users already like this, but if they do, it's likely targeting specific individuals known to be criminals that they want to capture.