I don't see whether the buying price or asking price matters really. I'm against some forms of what governments consider "scams", where people think they are buying something and are actually buying something else, but in cases where it is quite clear what is going on, I don't think you should interfere.
For example, Facebook sold a load of shares at a massively overpriced (compared to the value of their company) value, but at the end of the day, Facebook's profits and revenue are public, and it was up to them to set the share price, and likewise up to the potential shareholders to make a decision on whether to buy the shares or not. Evidently, a lot of (stupid as it turns out) people bought the shares, and had their investment effectively slashed in half as the price dropped. That isn't a scam; it's stupid people buying from stupid people (Facebook were stupid for setting the price that high, since they lost a lot of consumer trust in the process).
For example, Facebook sold a load of shares at a massively overpriced (compared to the value of their company) value, but at the end of the day, Facebook's profits and revenue are public, and it was up to them to set the share price, and likewise up to the potential shareholders to make a decision on whether to buy the shares or not. Evidently, a lot of (stupid as it turns out) people bought the shares, and had their investment effectively slashed in half as the price dropped. That isn't a scam; it's stupid people buying from stupid people (Facebook were stupid for setting the price that high, since they lost a lot of consumer trust in the process).