It's just more "ends justify the means" skullduggery from the left, using "it's for the children," and twisting statistics to "prove" their point that YOU should be disarmed.
I didn't read the article, but I bet "teenagers" probably included "kids" in their 20's. Their botom line is they want to take YOUR gun away from you.
Read Page 64 in this document - it's a great source for debunking myths.
John Lott also covers kid suicides in "The Bias Against guns."
I also remember reading years ago about suiccides and gun control, but I can't recall the source and don't find it my personal library. Japan has strict gun control and the suicide rate is very high.
Canada has stricter laws than we do and after passing their gun bans, suicides didn't decrease. Instead there was an increase in the use of other methods. When people are commited to offing themselves, they'll find a way.