Snapchatters were victimized by their use of third-party apps to send and receive Snaps, a practice that we expressly prohibit in our Terms of Use precisely because they compromise our users' security.
The lesson to be taken from all this is that, whoever you're sending messages to, just be extra, extra careful when sexting pics to someone.
And maybe again just for luck.
Though there are some perfectly innocent accounts out there, premium accounts are generally known for their adult content.