To pull off a scam you have to have mark (see point b above), who has something worth stealing (see point a above), and you have to get away with it (see point c above). The scammer trifecta. Bitcoin will continue to attract bolder and bolder scammers, conmen, ponzi operators, and hucksters until a, b, or c are no longer true (or less true).
Are you suggesting that investors who used GLBSE were dimwitted, or is the topic moving faster than I can follow?
I agree to your point though. Since there will always be marks who has something worth stealing, (c) needs to change. There is very little deterrence as it stands.
Have the shareholders who are siding with Nefario been exposed yet? Do we know their rationale? Do we know why the "contingency plan" failed, or had been designed so badly in the first place?