What is a response that is wise and appropriate?

Ideally some way to let the Russians know that such behaviour will not be accepted, without backing down, and without escalating to open conflict?

http://www.cbsnews.com/news/russia-denies-simulate-attack-on-u-s-navy-destroyer-uss-donald-cook/

http://www.cnn.com/2016/04/16/politics/russian-jet-barrel-rolled-us-aircraft/index.html