@stl156 - That is a decent solution to the problem, but to me it seems like too simple of a solution to a complex problem.
The fact is, the area is modernizing to the point that the government is not the ones forcing the belief in the practices of dukuns, it is simply the fact the area is modernizing enough that people are starting to believe in other things.
It is unfortunate that people are posing as fake dukuns, but I am sure that this occurred in the past, maybe not as often, but has always been a problem and that most people will simply not accept dukuns as part of their culture anymore.
It is easy to say the government can regulate them, but society has to accept them and that makes this an issue on how popular they are and if they are simply dying out due to people losing their beliefs in them.
This is a question that I would like answered in regards to how popular the use of dukuns actually is and if they are really that accepted anymore?