Re: About recording calls.
"Note: Americans have to give that warning because it's illegal to record calls without permission and courts in the US will not accept evidence obtained illegally."
That is only true in 2-party states where the call is intrastate. Interstate and 1-party state calls only need the knowledge of one of the call participants.
"In the UK we have to give that warning because it's illegal to record calls without permission"
Factually and substantially incorrect. It's perfectly legal to record a call for your own use.
It's a privacy breach to publish a call without the other party's knowledge, however that's a civil case and the person on the other end of the call has to go to court over it with very low odds of claiming damages, especially if the recording shows them acting in bad faith. It's perfectly legal to publish a call transcript - and in a court case the transcript is usually provided with the recording being entered into evidence if/when the other party disputes it.
In the UK, you do not need the other party's permission to record a call, but if you're publishing it, you do need to inform them it's being recorded for the reason given above.
To my knowledge, noone has EVER been taken to court in the UK for publishing a recording of a call they've been on.
Biting the hand that feeds IT
