Sorry, have been meaning to say this for a while and keep forgetting.
I've noticed that you can see people's email addresses sometimes when you click on their profiles. You have to be signed in but even so, not sure I'm comfortable with this as it's very easy for anyone to create an account and see these addresses.
Can someone look into this and maybe make it so you can't see those details?
(NB - this is something I'd rather have put in a PM as I don't want everyone to go and look!)