I invest a lot of money for people in my life (for free), so I fairly regularly get emails effectively saying: "Oh look at this stock my friend forwarded to me (pump and dump scam)" which I then have to explain why it isn't going anywhere. So it is already pretty bad (especially on venture exchanges), BUT when thirty thousand startups start taking investments from mom and pop investors the consequences are going to be massive. We're talking tens or hundreds of thousands of dollars from MILLIONS of people. Right into the lap of startups that don't even have a merchant account.
So the lesson here is get in on this early, profit harvest, and get the fuck out before it crashes due to irrational exuberance.