Even if there was some super weapon that only killed the the leaders of the military junta without any collateral damage, i would still be against using it.
You see. Everyone in Burma has found a way to live around the current power structure. Stability means people can make plans for tomorrow, to improve their lives a little. They probably worked hard to get where they are. With stability comes predictability. They wont have to find a new way to survive, they know how they got food today, they will get food the same way tomorrow. Relationships, interpedencies and rules would have formed over time between the people and the ruling militia. People probably bribe officals to get a break, and maybe some of them marry into power and better lifes. People have found a way to survive and make the best of their lives in the current system.
But, If someone on the outside killed the govt, not just the top but most of the structure of society would fall. Everyone would suffer.. a new power and social order would have to be built from the ground up. The status that regular people had managed to build with the officals and echother would be lost. All that hard work, all those plans, the rules, the relationships with the law, trading routines, would be lost. People would have to find a new way to survive.
And after all the fighting of a civil war, and the rebuilding of society afterwards.. Life might be worse, not better.
Its like Iraq.. people say life was better before the war (even many of the shiites say that). Who knows how long it will take until Iraq progresses to the same point as it was before the war. My guess is atleast 20 years from the day that US leaves.
Cheers