Rabbi Dr Jonathan Romain, Prominent Reform rabbi (with no relation to Rebecca ROMJIN O'connell), of Maidenhead Reform Synagogue, has written a guide book called 'Rabbis in Danger' to help rabbis avoid physical assault, death threats, black mail, or being propositioned by congregants.
Rabbinic Membership has its privledges, but it also has its pitfalls. Rabbi Romain, no relation to the lettuce, tackles this very relevant topic.
Suggetions like always have a fully charged cellphone, escape route and open door meetings with opposite sex are mentioned in the book of advice
Check the review here: http://www.thejc.com/home.aspx?ParentId=m11s18&SecId=18&AId=56096&ATypeId=1