Well it's official, a missile took down MH17 last year

http://www.bbc.com/news/world-europe-34511973 The missile hit the front left of the plane causing other parts to break off, it said in a final report into the July 2014 disaster, which killed 298 people. The West and Ukraine say Russian-backed rebels brought down the Boeing 777, but Russia blames Ukrainian forces. The report does not say who fired the missile, but says airspace over eastern Ukraine should have been closed. ...
MH17 Crash Published on Oct 13, 2015 https://www.youtube.com/watch?v=KDiLEyT9spI Video about the Dutch Safety Board’s investigation into the causes of the crash of flight MH17 on 17 July 2014 in the eastern part of Ukraine and the Board’s investigation into flying over conflict zones. The video was based on the Dutch Safety Board’s investigation reports, which were published on 13 October 2015.

The lesson here is simple: don’t fly over active war zones. Or maybe it’s just avoid Ukraine.