This blog will be devoted to a consideration of the Science of Facilitated Communication Training (FCT), as someone who uses it (as a facilitator, not as a person with a disability).   Given the way that FCT appears to have become a bogeyman for skeptics, this counts, I think, as degree of difficulty about 3.1. 
So: first step.  What is FCT? 
It's generally accepted that, at least under the name of FCT, the method was thought up by Rosemary Crossley.  Her book Facilitated Communication Training defines the method as 

"Facilitated communication training is a strategy for teaching

individuals with severe communication impairments to use communication

aids with their hands. In facilitated communication training a

communication partner (facilitator) helps the communication aid user

overcome physical problems and develop functional movement patterns.

The immediate aim in facilitated communication training is to allow the

aid user to make choices and to communicate in a way that has been

impossible previously. Practice using a communication aid such as a

picture board, speech synthesizer, or keyboard in a functional manner is

encouraged, to increase the user's physical skills and self-confidence

and reduce dependency. As the student's skills and confidence increase

the amount of facilitation is reduced. The ultimate goal is for

students to be able to use the communication aid(s) of their choice

independently.
Facilitated communication training is a teaching strategy of particular

relevance to individuals with severe speech impairments who can walk but

have had difficulty acquiring handwriting and manual signing skills.

Many such people are diagnosed as intellectually impaired and/or

autistic. Through facilitated communication training numbers of these

people have achieved functional communication, often revealing

unexpected understanding and academic potential."

That's the definition I'm going to be using.  If anyone wants to argue with that, give your own definition and the reason why you think it should be preferred and we can have a separate set of arguments about how that works out. 

This is going to be a long slog, so I'll just say on day 1 that anything not mentioned yet will probably come up later; I'm neither concealing it nor hiding from it.