It is extremely important to protect your devices from malware, as they often contain much more personal information than your computer. This information would be valuable for those who wish to take advantage of your online presence or access your financial or personal information.
It is also very important that you do not post personal information online, such as your address, email address or mobile number. Also, think carefully before posting photos or videos of yourself or even your children.
Once you post a photo online, most people can see it and can download it, it is no longer yours.