"how to stay safe on the internet" you must be verryyyy careful
even for the average safe internet user, people can still cause you a lot of grief by simple identity theft ------ something going around at the moment 'cause it is extremely easy to be done (which is scary to say the least) --- for example on facebook ----all the scammer/con artist/ etc needs is just copy your public full name and copy and paste your public display picture and public header and after that just start adding "your friends/family" on facebook which shall usually accept without a second thought where they can then -----
- get personal information from them
- post offensive material which seems to have come from you (on the different account, this is different to "being hacked")
- or probably the worst - message friends or family pretending to be stuck overseas or in grave danger and in need of some money as soon as possible
(if this happens to you needless to say, report it asap to facebook through the "report button", the false account should be deleted in a matter of minutes, and additionally you should message friends and family to let them know what has happened.........)
horrible these people can be, but you learn there's always new ways they are finding to scam people - both online and in real life too..................