Of course they are pr00ne, and thanks for the lesson in Orwellian double-speak.
Don't always believe the line about them being in international airspace
NATO extends enhanced Baltic air policing until end of 2015 at least - IHS Jane's 360
"Before 2012 there were no incursions into Estonia, in 2013 there was one, and in 2014 there have been six or seven so far."
They would do this if they were Canadian, Latvian, Belgian or Nigerian, civil or military...
"If they were...", but they're not, are they.