PR Twitter PR hashtag offers tips in what not to do Try not to address that female editor as ‘Dear Sir.’ Don’t solicit Valentine’s Day love if your trains run late. Check out the hashtag #PRfail for these and other cautionary tales of PR gone wrong. By Russell Working@byworkingFeb. 16, 2015 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.