Here at Kapiti SeniorNet we spend quite a bit of time exhorting our members to be computer security minded for the very good reasons that failing to do that can be an expensive lesson. We even run a workshop on dealing with spam showing you what can happen and how easy it is to be hoodwinked.
Computer security is a bit of a misnomer because computers can never be 100% secure. In 2016 alone cyber thieves stole US$81 million from the Central Bank of Bangladesh, and data breaches were still rife even after several of the high profile cases such as SONY and Yahoo. In the latter case Yahoo was in the middle of being taken over by the telecoms company Verizon in a US$4.8 billion deal that was nearly derailed as a result.
Then there was the Russian hackers interference with the US elections, and closer to us the black market in computerized extortions.