Children are also more likely to share very personal information, such as phone numbers and addresses (including in an otherwise harmless photo of themselves with a friend.) If these kids have strangers as friends on Facebook, posting this information could lead to a very dangerous situation.
Many foreigners asked about the well-being of their Japanese friends, even if their friends were based in Okinawa or Fukuoka, several hundreds of miles from the dangerous quake zone.
Not a car game (that could be fun but dangerous if people were inspired to play it while driving), but an app that challenged you and your friends to an on-foot race.