I think for all these issues crypto exchange regulations is a must just like forex exchanges or brokers are regulated to safegaurd investors and traders from scam or fraud.
The decentralized exchanges can't be regulated unless they are willing to do that if the gov't where they are residing starts to ask them to do so. The lowkey dexs can't be asked to do that, especially if the developer and owner are unknown. But I don't think many traders will go there if the owners are anonymous.