You should ALWAYS be concerned about privacy and security.
Will you be displaying people that are currently alive?
Will you displaying people that have died in the last 72 years?
Will you be displaying sources that contain information about people that are alive but not in your family?
Will you be displaying copyrighted material?
If yes to any of these questions your should/must be concerned about privacy, and probably security as well.
Security also relates to how secure your data will be in the hands of others, for example will the company you use go "belly up" and not give you back your data.
Will you be displaying people that are currently alive?
Will you displaying people that have died in the last 72 years?
Will you be displaying sources that contain information about people that are alive but not in your family?
Will you be displaying copyrighted material?
If yes to any of these questions your should/must be concerned about privacy, and probably security as well.
Security also relates to how secure your data will be in the hands of others, for example will the company you use go "belly up" and not give you back your data.