Originally Posted by CRPercodani
I would imagine it is disabled because it is illegal to record the call unless the other party consents
There are many states where it is legal to record a phone call as long as one person involved is aware that the call is being recorded. Further, due to Section 508 of the Americans with disabilities act there are people who can record anything they want at any time without telling anyone. These are people whose disabilities affect their memory or their understanding of human speech. Letting them record their conversations theoretically enables these people to go back and read this and to the words so that they can be sure they are understanding what has been said.
Naturally the same thing would apply to recording phone calls.