Spam Email

One of the most annoying things about internet is spam emails. Most of them are unsolicited advertisements, and some of them are scams, which pretend to come from your banks, online sellers, or even government. I once received one scam email which claimed coming from Bank of America and let me give my account information. I almost trusted the email and was about to release my person information before I called Bank of America and found it was a fake.
Most of time, I will trash them right away without reading them. However, I may scan through the list of titles to make sure the mail server does not put some "good" emails into the "spam" folder by mistake before I delete them permantly.
In terms of sexually or inappropriate emails for kids, parents should set up the filters properly in order to filter those email before the kids access them. In the meantime, parents should educate them and make sure they are aware of the existence of these kinds of emails and deal with them appropriately in case they have access to them.
Spam emails are difficult to fight against. More intelligent softwares are needed to develop to deal with them. However, it is impossible to remove them completely because the technologies at both sides develop at the same time. Hence, the more viable way is to let people be aware of it and able to handle it in a correct way.