Possible solution:
I'm not sure about the solution but maybe we can make a team called "Altcoins Investigation Team( AIT)"
Maybe Bitcointalk decided to make a official fund option, that's work is who want to sell his coin,he must need to deposit his 25% of Target amount in BTC from his personal fund before selling any coin and then if the team complete there promise more then 50% from there planning or Roadmap,then Bitcointalk fund can be send to the coin developer.
Maybe any project can be mandatory verified by a Altcoins Specialist Team(AST) before selling any coin.
There are many solution possible if we think about this issue!
The only solution to this issue is not to create any more altcoins! Having said that, I must confirm that I am not against new ideas and new businesses. The crypto community can't really grow without new ideas and businesses around it.
However, it's high time that these business owners stop creating new coins and start accepting bitcoins or any other popular coins to fund their business. Just the way our traditional stock market works where companies pull funds in fiat currency and use it for their businesses. Later pay dividends to share the profita made by the company.
I personally think, this would make a lot more sense instead of creating a new coin. But I agree with the idea of creating an investigation team as well. That would eliminate a lot of scam attempts at the first place.