We shouldn't rule out that they're being substantially misleading, but I don't think we should just assume that either.
I find it dubious that each one of them gets over 50 predators attacking them the moment the post a selfie on Instagram. Either a small number of pedophiles would be targeting thousands of kids per hour, or there are millions of pedophiles.
The basic premise of the article rings true (posting selfies on can lead to getting attacked by predators), but the numbers are just ludicrous.
I don't doubt that this stuff happens. The web is full of filth and excrement. But using the language of moral panic to sell a dubious service is just crass.
If we must wade into the debate about whether kids should have access to it, my answer would be a resounding no. I know of ten year old girls with smartphones. I try to tell people that those things are portals to hell, and they look at me like I have two heads.
The web has morphed into a raging monster, and 'mobile devices' are the devil incarnate.
We should step back from the abyss, or at least refrain from looking into it, lest we discover that we are but monsters ourselves, and the abyss is only a mirror.