Glycer
ol too, but they don't the have right size and form to interfere with the same receptors as ethanol does. They do readily cross blood-brain barrier, but since 0 nic people aren't getting drunk/baked/strange on vaping... I guess you would probably die of suffocation before reaching the threshold of plasma concentration where it matters. Seems to be the case of alcohol too, since nobody gets drunk by cleaning wounds.
Edit: Scratch that, you can get drunk from inhaling alcohol. It's even more dangerous because you don't have the digestive+liver system metabolizing part of it before it reaches bloodstream. Now someone needs to make the math of how much organic ejuice someone would have to vape to reach one beer can.
I'm still thinking of suffocation happening first here unless companies start to add more alcohol content.