[Istof]

Then they might start putting traceable additives to foods to better track you.... eg: you eat at restaurant X.... or shared food with person Y (by analyzing combinations of additives)... or used too much of drug Z...

[pavel_lishin]

Now that's an interesting thought.

Especially coupled with another reply, about my insurance company buying me one. They buy me one tomorrow, and raise my premiums the next year because I drink more than their actuarial table allows.