Your logic fails at an important point. This would only be possible if those people who presumably died in the crash couldn't communicate with their family members, which is hardly so. This could work for 2-3 men but not for half a hundred...
![Cool](https://bitcointalk.org/Smileys/default/cool.gif)
In kiev military forces is normal practice to take away smart phones and cell phones. All that armed people have no independent news about situation.
At check points kiev forces are asking people to call relatives with notice, that they are alive with written messages on paper.