Joe makes good points, although (so far) I've not had anything real bad happen. Interesting, though, about Amazon and redirection. Wonder what other sites such nefarious activities occur?
Regarding security with whatever (Mac OS, applications, the internet, etc.), it's important to realize that in almost all cases, security patches/updates are basically a reaction to a security issue that has already happened, so it is best to install the update as soon as possible. And of course using a product like Malwarebytes or ClamXAV every so often is good too. But there is no such thing as 100% protection. That's why it is imperative to be proactive and diligent when it comes to security, no matter what.
