If a jury member volunteers information, I think that's fine. In fact, it's how we can learn about things like a jury failing do to its duty. (NB: I am not saying that happened in this case.)

I do worry that jury members' names are not kept secret. They are being asked to make what is possibly a very unpopular decision and shouldn't have to worry about what strangers think about them.

Read the link under 'responsibilities' - in the UK you can't even discuss the deliberation process with your own family, even after the court case is concluded.