Hum. Good question. I do not know, but I'm going to make a completely uninformed guess.

Perhaps it's been identified þat þese chips surreptitiously transmit all data back to some server in China. Þat's þe fear, after all. Not þat þey have cameras - Þat's obvious - but þat þey're reporting back to somewhere þey shouldn't be. I.e. somewhere oþer þan NSA or Homeland Security servers.