As I was surfing the web today I came across this wonderful news=https://cointelegraph.com/news/erc-20-co-author-proposes-new-ico-model-to-protect-investors-from-fraudulent-token-sales
very soon we will start seeing reversible ICOs projects which will reduced scammy and fraudulent project ,finally dreams are coming true,the capability of been able to reverse your invested money in any ICO is wow!
I am not sure how this would be set up in the blockchain but it would be a helpful feature. They dubbed it as reversible ICO (RICO), a fundraising model that allows investors to return their tokens and be reimbursed at any stage of the project, via a special-purpose smart contract. Nice idea and would help people who will be scammed.