The problem is that you don't get to opt in and know in advance so you don't say anything confidential over a call. If they gave users a warning then I guess this whole thing wouldn't be blown out of proportion.

How do you sensibly tell a user "we are listening to this conversation"?

Like Google did it in the old days?

> "READ THIS VERY CAREFULLY, THIS IS NOT THE NORMAL YADDA YADDA

> We are going to READ ALL YOUR FILES to index them.

> If you have a problem with this, cancel the installation.

> We are not going to ..."

This is how I remember that part of the installation process for Google Desktop Search. Crystal clear. I knew exactly what was supposed to happen and I had a warning in case it wouldn't be OK with policies at work.

And yes, YADDA YADDA or something similarily sounding was part of the first line.

"For the purposes of improving our automated translation service your conversation may be recorded and later become available to human intepreter to evaluate our machine translation" (add lawyer-speak here)

"we are listening to this conversation"

That should do it, I think.

“By logging in and encountering this message, you have given us permission to listen to and record your conversations in the past”