OK, I looked further into this from both the LA Times articles and the Wikipedia entry. I will take back that the entries were vague, but I will still assert that the investors should have done some basic homework.
LA Times
Investors have to protect themselves by using some common sense. It’s financial gospel that no one makes a profit in the markets each and every year. Anyone who claims such powers should be viewed with the same suspicion as poker players who never lose.
However, unlike many other successful money managers, Madoff was reluctant to discuss his investing style. In his financial documents, he simply described capitalizing on market movements using stock options. But there were few details on precisely how he was able to put up those steady returns for so long.
Wikipedia
This is the problem with personality-driven investing. We want other people to take care of our money for us, and we usually don’t understand what they’re going to do with it. In fact, that’s often the point. Investment managers like to paint their strategies as so complex that only mathematical geniuses can understand them. As a result, investors are left to simply trust that these gurus won’t blow their hard-earned cash.
Madoff was a “master marketer”, and his fund was considered exclusive, giving the appearance of a “velvet rope”. He generally refused to meet directly with investors, which gave him an “Oz” aura and increased the allure of the investment. Some Madoff investors were wary of removing their money from his fund, in case they could not get back in later.
This is what I was referring to. Many people got caught up in this because they thought they were hot shit, not because it was a particularly smart thing to do.
Red flags
…Markopolos later testified to Congress that to deliver 12% annual returns to the investor, Madoff needed to earn 16% gross, so as to distribute a 4% fee to the feeder fund managers, who would secure new victims, be “willfully blind, and not get too intrusive”. In 2007, hedge fund advisory fund firm Aksia LLC advised its clients not to invest with Madoff, because of the appearance of limited accounting service personnel
Link to Madoff statement sent to investors
It doesn’t take long to investigate some of these companies to see what the real returns are. But the hot shit investors (that stayed; absolutely some of them left because of the issues that are raised here) didn’t.
I realize that because of my MBA that I may have a biased look at this. But I still don’t think it takes a lot of time to investigate exactly what any financial planner is doing. The companies that he or she’s using have public websites and their ROI can be checked. And if you can’t find a website for a company, that really should raise red flags. I also realize that some people like to play fast and loose in investments and therefore may make high risk decisions. But those people aren’t going to be complaining when they fail, like the Madoff victims did.