Like many other famous social media apps, Snapchat's minimum age rating is 13+ since bullying is very much possible and may hurt young children's mental health.
The easiest way to repel strangers on Snapchat is to simply block them but if it doesn't work unfriend them and choose the option "friends only" in settings.
Snapmap can be dangerous since people can track other's locations so it is safer to turn it off.
snapstreaks are gotten when a lot of chats are sent simultaneously and are rewarded but this can take very long and people may say very personal things to keep the streak going.
due to "snaps" disappearing eventually, inappropriate videos or texts can be sent.