Yik Yak is the most dangerous app in the world, says noted Fox News contributor psychiatrist Dr. Keith Ablow.

It just came onto the radar early this year, mostly on college campuses, and spread quickly to high schools.

The app allows someone to post a message that can only be viewed by someone with a Yik Yak app on their smart phone who is within a mile and a half of the sender.  They key is that the message is anonymous.  In a high school, it could have come from anyone on campus. 

“My concern for anonymous apps is that it really does open the door for people to turn off the common sense they would normally have if they had to stand behind their words,” says Kami Watson Huyse, a specialist in social media.

That cloud of anonymity creates a climate for the dark side of people to emerge.

Sometimes, many times, messages are cruel.  Nasty.  Vicious, hurtful, out and out lies and clearly bullying.  For those on the receiving end, there is no one to strike back at.

“My concern is that there is so little in the way of stop-gaps to keep it from turning ugly, and I think that’s my concern with all these apps.  Anonymity really does breed abuse,” Huyse tells KTRH News.

The cyber-bullying has become so overbearing that the creators of Yip Yap have spent the past several months blocking every high school in America from being able to access Yik Yak.

And just as adults, parents, become aware of something evil that could be preying on their child, new apps emerge.  

Now growing in popularity are whisper, secret, and what is said to be the worst – rumr.

It’s hard being a parent keeping up with new threats around every corner.