"What's there to object to DME?"
Don't get me wrong; I like DME. I think the only real issue is that we have a tremendous amount of liquid fuel infrastructure that is usable with methanol. We aren't designing a new infrastructure; we have one that will be modified as needed but it won't be scrapped and rebuilt. At filling stations all over the country, we have liquid tanks and liquid dispensers. The fuel systems in our cars are based on liquids. That would require much less of a shift to run on methanol than DME.
"You just need one or two cute blonde haired babies to go blind from methanol exposure and you have a huge public relations problem on your hands."
And that is going to happen regardless of the energy source. Someone is going to blow themselves up, someone is going to have accidents with gasoline, DME, or pretty much anything we could envision as an energy source is going to kill people or damage the environment somehow.