YOu captured most part of the issues.
Profiteers most times capitalize on the ignorance of their victims, and I strongly think this is the case with adulterated LPG in Nigeria.
Not visiting road side retailers will help too, but one of the model we proposed to increase the uptake of LPG is to make the fuel available and close to the consumers like the traditional kerosene.
We will expatiate on this tomorrow @shakz, thanks for reading.