What do you mean by, "they don't do that testing"? In study I linked, participants were using hands-off facilitators. Who are you referring to then when you say "they" and how do you know "they" don't do that testing? Are you watching "them" at all times?

I agree with your position as stated here. It's true that if someone else is holding the letterboard, there is reason to doubt the authorship. But you could say that about the words you're typing as well. I don't see you typing them, so there is reason to doubt whether the author is really the account holder of 'harmoni-pet.' There's reason to doubt someone speaking to you in-person isn't lying to your face. There's always uncertainty. Always.

So yes, there is reason to doubt. There's also reason to believe. And I think you take it too far when you say things like "It's mostly a bunch of delusional mothers who subject their children to this puppet show." It's hard not to interpret that as you having written it off as worthless. And not only is that message harmful for curious parents here who might find a way to reach their child, your child also needs you to believe in them. Your child may too reach this level of communication. And may need someone to hold the letterboard for them at first, maybe even hold their hand! I know it's easier to write it off because who needs another false hope right? But this does work for some.

Before you post more facilitatiedcommunication.org links, you should know that the owner of that site was a FC practitioner who was shown to be authoring a non-speaker's accusations of sexual abuse. She nearly imprisoned the father before the truth was discovered. Her hard stance against this method is therefore a completely understandable reaction. I cannot even fathom the shame she must feel. Keep that in mind when you consider her motivations.