Ya gotta look at the motivations involved. There is good and bad in everything.

Most of the suppliers of veg equipment are in it for the money and want to sell people a bunch of extra crap they don't need. Then they justify the sales with a bunch of psuedo science bad advice. There is a definite cult mentality involved.

Many of the buyers are either looking for something for free or want to buy cool. Much of this is ignorance chasing vanity. Most of them couldn't make a MB run on diesel, much less anything else. The fact that the same threads and same questions are posted repeatedly points out the lack of inititive in this crowd. Anyone who can't figure out the search function on an internet forum isn't cut out for fuel system work.

Running a car on veg oil is a happy story, fun to tell and fun to hear. I guess the good is that many more people hear about alternatives to the petroleum industry products as a result. The death of these cars will count for a whole lot more than the ones that were crushed so that polluting industries could buy their pollution rights.