Equity crowdfunding platforms will be responsible for due diligence and standardizing the equity offerings instead of the individually negotiated deals and preferential deals to different investor groups that is the norm right now.
I run crowd-lending analytics and automation platform, PeerCube https://www.peercube.com, for retail lenders on Lending Club and Prosper. I also consult and advise hedge funds and institutional investors on the same platforms. In my experience, retail investors appear to be much more vigilant, perform much more due diligence and selective than the institutional investors. This is primarily due to "own money" versus "other people's money (OPM)" and the amount of money deployed. When you have your own skin in the game, you are more vigilant.
Your arguments are more about maintaining segregation of certain areas for "privileged" classes. Exact same arguments were made when SEC approved retail investor participation in p2p lending in 2008/2009.
Edit: More details on SEC approved rules in SEC press release http://www.sec.gov/news/pressrelease/2015-249.html. It appears there are enough safeguards in place to alleviate investor screw ups.