USN has given plenty of Russkie Bears plenty of scares over the years and read recently of RAF Lightnings zooming under Bears at night in full burner and going vertical right in front of them. Amazing really that there haven't been more mid-airs over the years. There was of course that collision between a Norwegian Elint P-3 and a Russkie Suk a few years ago - one tail of the big Suk hitting a prop of the P-3 causing big issues.

It can happen to civvie pilots too.
I once met a guy called Mark Jefferies in the UK at his Yak UK business just outside of Bedford in the UK. Mark is a very talented competition aerobatics pilot and multi-UK champion. As part of his business, he was once ferrying a L-29 jet trainer, got into strife and was intercepted by a Suk and was detained for a few days. I sure would have needed my flight suit hosed out after such a event!
http://markjefferiesairdisplays.com/2012/01/mark-jefferies-international-air-display-and-aerobatic-pilot/I expect we'll see a lot more of this in this region. Chinese are showing a great deal more assertiveness patrolling their ADIZ's. Those Elint crews have massive brass ones in my opinion. Unsung heroes of the Cold War and whatever you call what is going on now up there - The East China Sea Tango?
Sure ain't singing around a campfire together singing Kum Ba Yah!
Score is 1:0 in favour of the USN in P-3 versus Chinese fighter intercepts. Chinese may still be pretty sore about this?
http://en.wikipedia.org/wiki/Hainan_Island_incident