Just received a warning about this from my daughter's school.

See also https://en.wikipedia.org/wiki/Blue_Whale_(game)

From wikipedia: "The game involves a series of duties given by the administrators that players must complete, usually one per day, some of which involve self-mutilation. Some tasks can be given in advance, others can be passed on by the administrators on the day, the last task being suicide. It is believed that the first case of suicide related to the game occurred in 2015 in Russia."

EDIT: Also from wikipedia: "While the phenomenon is real, some publications have exaggerated its scope, leading to a moral panic"

This looks like a mix of some real suicides with a fake urban myth. It's similar to the burundanga stories or the LSD tattoos stories, but in this case they mix some sad cases to make it more credible.

These stories used to circulate as email chains, until some school or police department take it seriously and make some official warnings.

http://www.snopes.com/blue-whale-game-suicides-russia/

http://www.snopes.com/crime/warnings/burundanga.asp

http://www.snopes.com/horrors/drugs/bluestar.asp

Maybe I'm just jaded, but are 15-16 year olds really not cognizant enough to avoid stuff like this? Either something is missing from the story, or there's some heavy fabrication here.