So far as I am concerned, leaving your email address out in the open like that is just an invitation for spammers, so I flagged the comments for deletion, particularly since there have been some very well publicised cases of doxxing recently, and no-one should be adding fuel to that fire.
However, one of my flags was marked as helpful and the comment deleted, and one of them was declined, and the comment is still there.
So, for the sake of clarification, what's the site's policy on people leaving personal information around the place? In these particular instances the deleted comment was asking people to email with answers. The not-deleted one was in order to arrange further discussion of the asker's issue. Does this difference of intent/usage require a different approach?
What should we do when a user leaves their personal details (such as email address) in a question/answer/comment?