hi I was reviewing https://math.stackexchange.com/review/late-answers/180248 (also ) How to find an ellipse , given 2 passing points and the tangents at them? and the new poster gave his email address in the answer, at the moment I just flagged it (was this the right action?) the post because of this but what is the general opinion on this? - should we remove it,? - warn the poster about it? (it is a first answer of a new user)
or something else?