Snapchat will allow you to choose who you want to share your location with, so you can select a certain group of followers.
The requires installation first before it can be used.
Doing this each time you want to hack.
In most cases, if you let us use your information, you can simply revoke your permission by changing the settings in the app or on your device if your device offers those options.
Additionally, all your Snaps and Chats are recorded by the system, and anyone who receives them could potentially copy and save them offline.
Additionally, you have to remember that Snapchat was built to delete the messages, be it a picture or just text.