Last month I visited a new city and was curious to see what their Yik Yak was like. It was essentially a stream of abusive posts like those featured in the article. While refreshing the app I saw a glimmer of hope. Someone wrote "X is a really nice guy." The post was down voted to invisibility in literally less than two minutes.
I have my beliefs about the importance of freedom of speech and safe, anonymous places for whistleblowers etc. But this is something else. It makes my stomach churn. I'm readily admit that I am biased on this issue, I've seen first hand how much pain this app causes people.
I'm told that at my old high school there is at least one student on suicide watch who would not be without Yik Yak. Putting aside arguments about freedom, if taking down an app could save a kid's life then shouldn't we do it? If Formspring didn't exist then it is very possible that the four minors who committed suicide in connection to the site[1] might still be alive today.
[1]http://en.wikipedia.org/wiki/Formspring#Controversies
EDIT: Keep in mind there is a difference between free speech and hate speech (http://en.wikipedia.org/wiki/Hate_speech). Ditto for libel (ex the article's quoted posts accusing the school principal of molesting children).