Dear me indeed.
ABA in its infancy undoubtedly attracted some odd people and, like everything else, probably still does.
There are good, bad and misguided and deluded peopel everywhere.
The hard work happening at present to establish a UK ABA board (simliar to BACB in the States), get behaviour analysis recognised by the Health Professionals Council) and the ABA Competencies Project will all go a long way to regulating the profession and weeding out the charlatans.
The same is true of the concerted effrots of many to embed ABA into state provision so that people don't have to go through the hell of legal battles and/or send their kids to schools costing the tax payer a fortune, when ABA based education and s/lt need cost no more (probably less actually) than current dismal mishmash of provision which is a disgrace.