angels
1) After IL-76 downed in Lugansk lots of airlines started to avoid that airspace.
2) Now russian airlines fly just 10 n.m. to the east from separatist's controlled territory. It is within range of BUK.
non-russian airlines fly at least 50 n.m. away.
So think about airlines responsibility too. Even if russian terrorists didn't have BUKs or smth, they could down any passanger jet in case of it's depressurization and descending to FL100, with manpads.