"How can we internally moderate and regulate ICOs without the SEC or other organization's involvement?"

A couple of ideas:

• create a private badge of approval: a foundation or something similar judging ICO's for fairness and some other objective factors
• similar but by means of a branch organisation
• people just getting burned. They won't do it twice (yes, that's learning the hard way)
• educate people by joining discussions in social media (politely and constructive)

Just some thoughts.