These days, we sometimes treat our private information.
You must be careful about managing of your personal datas bacause if your datas flow out, your datas may be used for crimes.
You should not post your private information in the internet, and also you should think about the believability of the site when you input your datas and delete your personal datas on the compurter of the community.
In short, you should think measures to your data's outflowing.
And also,it is important for you to manage your passward certainly.