It's not that these people don't know the known financial scams. These people think they're too smart to fall for them, and think that regulations are "for the weak."
Or think that, in a market not regulated to control them, they will be able to make money perpetrating them.
Bitcoin users and proponents dont "think they don't need regulation", they reject it. They don't "think they won't fall for scams", they accept the risk and possibility. They don't think "regulations are for the weak", they think regulations are for people who accept their government knowing everything about their finances and need transactional legal accountability. Your comment, and the parent one, are nothing more than really weak strawmen.
[1] :: I'm kinda sorta working on something that might help solve this problem, hyphaelia (https://github.com/kurotetsuka/hyphaelia), which could theoretically be used to create a trustable darknet marketplace. I'm nowhere near that point yet though.
I have yet to see any business in the bitcoin space that many bitcoiners themselves didn't say was a scam. Literally every business. As a group, bitcoiners are the most scam-declaiming group of people that ever lived.
As a group. Individuals are something else again.