Unfortunately we see some potential spammer activity where somebody is going through profiles systematically, looking for emails.
I therefore recommend you remove email addresses in your public profile.
Most people here don’t have them showing anyway – it is just a small proportion.
Note this is not the login email; that is not visible to anyone but admins.
Please disregard this thread.
I have discovered that those emails are in fact NOT visible to non logged in users The only potentially useful contact detail visible is the “personal website” one, which only a few people have configured.
There must have been a software change at some point because originally that email was visible to anyone and I recall a discussion about it.
So, no action required, which I am always pleased about