Well, think of how incredibly valuable Crimea will be for them, it will more than repay the damage done to the fact that Putin shredded an international treaty to get it. For a prize that big, making the other signatories pay the price of looking like they can't hold up their end because they are unwilling to risk an escalating war with an unstable nuclear power state willing to shred international treaties. The other signatories will now think that any treaty, large or small, with Russia is not worth the paper it is printed on, and it made them all look really bad, so you can imagine that those that Russia will have to deal with for the next decade won't actually come to any negotiation with a tinge of hostility. It is just a good thing that Russia has such a stable economy and isn't dependent on selling its commodities in exchange for things of higher value. I can't imagine that even the Chinese aren't looking at this in a way that raises future suspicions during real world negotiations in the future. If they know that fewer powers will play with Russia on an even field due to this, the will see it as a point of vulnerability.
Putin is a real leader, this is what a leader looks like, if you are in the Tea Party.
Maybe they can get an H bomb, place it under red square and give someone the trigger. All treaties will now have a provision that instructs the trigger man to vaporize Moscow if it breaks the treaty. Then maybe some other country will sign it.