it's interesting that you compare the danger of running without an exhaust to putting sugar in a gas tank..
fact is that sugar in a gas tank does no harm . Sugar doesn't dissolve in gasoline so it just sits in the tank.
Check it out at Snopes break>
Now we gotta wonder if the thing about the exhaust is just another urban legend.
If someone can explain, in scientific terms or with logic why a 2-stroke needs backpressure, speak up.