500 Passwords your friends may be using. July 29, 2010 By Sarv007 9 Comments Click image to enlarge. This poster has a list of top 500 common passwords that you should absolutely avoid using with your online and offline accounts. You can buy printed version of the password poster is available on Etsy. Related posts: Generate Good Unhackable Passwords. Worst Online Habit:Using One Password for Everything. Hack-Email websites passwords WinXP and much more….. How to Password Protect PDF Files?