"You shouldn't use them, because of the software, but also, because

    your cell phone is a tracking device, even when it is turned off,"

    Stallman said. Interestingly, in the minutes before the talk began,

    Stallman padded up one aisle in his stocking feet talking into what

    looked like a mobile telephone.
I don't carry a mobile phone, but I don't see anything wrong in

borrowing one from someone to make a call.  In the same sense, I would

consider it wrong for me to have a machine with Windows on it, or to

use one regularly, but I see nothing wrong in using someone else's

Windows machine for a few minutes.
I don't think the words quoted are my exact words.  Reporters

often change quotations.