We don't have a good way to keep all the Hork-Bajir tied up so they don't hurt themselves or each other, it'll be complicated, and it'll be an even worse mess if we only do it all at once when we've got the other hosts to hold Dracon beams with.

Makes sense. The Hork Bajir won't believe it if told they're free?

They're not very smart. They wouldn't understand why and wouldn't be able to think of another reason.

Okay. 

He waits patiently.

Eventually the Sub-visser calls them back in and wants to know if there's a way to get some of the "acceptable hosts" and maybe some more stunners than they have lying around in advance.

There should be. He will have to write the request himself; they'll be able to tell if the Yeerk did it.

He will also need a location for the stuff to be materialized at.

Letter to Cam: they're requesting an early delivery of temporary nonsapient hosts and stunners for easier transition. Site for it just north of here, big clearing.

Should you maybe specify quantities? wonders Keften.

How many do you want?

"How many hosts do we need and how many stunners?" Keften asks the Visser.

They want two hundred and a stunner for each.

He adds this to the letter. He signs it. He deletes it.

Keften has to explain this means of communication to his superiors.

There's a delay, and then there's a couple hundred basement dweller humans with stun-only stunners laid out neatly in the clearing.

Oh, good. That ought to settle the 'are they really that powerful' question.

Yup. It does.

The Visser and Sub-visser pick out some particularly unflappable subordinates to get the basement dwellers where they need to be. Keften is supposed to help, since he knows what's going on already.

They start gradually emptying out and stunning the Hork-Bajir.

It is looking like everything will be nice and orderly.

...They need Keften's Elf to please write that they forgot humans don't eat trees, please send something for these humans to eat.

...oops.

Letter to Cam: the hosts need food. Everyone here is being very cooperative, can they get something tasty?

Sure. Here is some food, the tastiest available in shelf-stable-for-a-few-days-and-needs-no-microwave.

Meanwhile:

The Council of Thirteen have the goodwill ambassadors infested by lots of different Yeerks and don't tell the ambassadors anything, nor take them up on their offer to be teleported around for internal communication purposes.

One manufacturing colony says it's calling their bluff and will just go ahead and starve, thanks.

One ambassador is infested, departed, and stunned. When she wakes up the planet she is on has been completely evacuated.

One Sub-visser infests her ambassador herself on behalf of the Visser, and then proceeds to pull a Ristrell. She's very diligent about noting the names of the casualties.

The others get results more similar to Lahtaron's, albeit mostly with less personal friendliness from their Yeerks and more dithering on the parts of the relevant authorities.

"All right. Let's kill the generators."

"We should probably particularly prioritize attention to the one that says they'll just starve, in case they change their mind when the generators go down."

"Yeah. Maybe put a ship in orbit, make it known we'll teleport up anyone who changes their mind?"

"Can we get it low enough and put a Flat Elf on it that osanwë will do it so we don't have to spread the demons too thin?"

"Should be no problem, unless there's something weird about the planet."

"Something weird like...?"

"Population's really distributed, it's big enough that low orbit's still more than 300 miles out..."

"Generators on that one were all clustered and it's a bit smaller than Earth."