If the issue of impersonation is more severe than the examples above, it's time to call a lawyer. Your tax money pays for lawyers with the following entities:
Contact the Security Exchange Commission (SEC):www.sec.gov or Call (877) 442-0854 Federal Bureau of investigation (FBI): www.fbi.gov United States Postal Inspection Service USPSIS: www.uspis.gov or Call 1-877-876-2455