A daughter of a friend of mine has experienced severe stalkering and harrasment by an ex-boyfriend. She installed the system to her PC again, he had probably installed a keylogger to the PC. She also changed all passwords (he had read the emails and used the FB's log to see from where this girl was logging to the PC). Having studied the topic, this guy is at least to some extent a security expert. Some questions: 1) Is is possible to hijack ones FB or Google account (after getting the passwords by a keylogger, eg.) so that although you have later changed your password, the accounts would report them and other activity to the criminal? How to check this? 2) How easy is today to hack into a computer which is online? (By getting first the IP somehow.) I personally guess this is unlikely. She should of course be careful with email attachements.