It will take the big organisations to push for legislation in the area of Puppy Farms, Animal Welfare and control in the area of Animal Behaviour work.
If you are a large rescue or organisation please send the message out by promoting trainers and behaviourists with qualifications (academic) and FULL insurance. Verify all claims of certification and membership of associations or groups. Check out these associations with specific reference to how a member is assessed, who assesses them, how and why they are qualified to assess a person, what protocols are in place for colleagues assessing colleagues? What is the pass criteria, how is this documented and most important what is the code of ethics and what happens when a member breaks this code? Remember self regulation is no regulation.
Industry standard and regulated organistions include the Association of Pet Dog Trainers UK (APDT UK), Association of Pet Behaviour Councillors (APBC), Council for Professional Dog Trainers (CCPDT), Centre of Applied Ethology (COAPE). Good trainers are and want to me members of these groups.
For now and until this area is regulated please ask questions, do not do anything that makes you feel uncomfortable and always dig deep and find the meaning of titles, associations and certifying bodies.