Hi KTC,
Yes, the purpose is to make it clear when you behave like a thug you're NOT accepted.
He went from hosting the Olympics, (with hopes of looking good) to doing a land grab, despite having signed onto a treaty in 1994. Ukraine gave up their nuclear weapons, to be a left alone by Russia. Russia broke that treaty..
Before voting on accession, Ukraine demanded from Russia, the USA, France and the United Kingdom a written statement that these powers undertook to extend the security guarantees to Ukraine. Instead security assurances to Ukraine (Ukraine published the documents as guarantees given to Ukraine),[6] given on 5 December 1994 at a formal ceremony in Budapest (known as the Budapest Memorandum on Security Assurances[7]), may be summarized as follows: Russia, the UK and the USA undertake to respect Ukraine's borders in accordance with the principles of the 1975 CSCE Final Act, to abstain from the use or threat of force against Ukraine, to support Ukraine where an attempt is made to place pressure on it by economic coercion, and to bring any incident of aggression by a nuclear power before the UN Security Council.
http://en.wikipedia.org/wiki/Nuclear_weapons_and_Ukraine

DO SOMETHING!