“A little knowledge is a dangerous thing“, so says Alexander Pope, and rings true as far as security is concerned. Sure, Windows viruses won’t wreak havoc on Linux systems but bear in mind, social engineering can get pass through port 80 (otherwise known as HTTP port or the web). If you are only as strong as your weakest link, then end-users’ ignorance will surely hit hard on them. Just like in real life, you don’t simply let anybody enter your house without looking at them. Beware of surprise/suspicious emails, audio/video attachments, emails from unknown senders, YouTube, Facebook, etc. Anything online must be taken with a grain of salt. Better yet, use HTTPS Everywhere Firefox add-on or the NoScript extension. Security comes with a usability trade-off but it’s better to be safe than sorry.