ICO cannot have stricter rules because it has been so since the beginning. we can only request to remove it from the market and support STO or IEO. ICO really can't give investors the best benefits. Let IEO and STO do that. RIP ICO.
It can have a strict rule. To avoid losses from investors, government institution should step in and regulate ICO. This institution will filter ICO's and give license to those who pass their criteria. If this happens, ICO will be a lot safer than IEO.