I noticed that the email notification I receive when someone replies contains all the email addresses of everyone else in the "To" field. This is a privacy issue which I think should be solved.
These other addresses should be undisclosed, or at least in BCC.

Good observation! I second.

Yea this is a huge risk to anyone here.

looks like only people subscribed to a section. I am guessing its part of the mail function that just needs to be modified slightly.

Yes, we are aware of this problem and we will fix it in the next version.