We can't hesitate these changes as this gonna happen if these scamming issues will not stop. And that was the time the government will give 100% support to cryptocurrencies.
If DEXs start enforcing KYC, then they wouldn't be decentralized anymore. That's because they're introducing the middleman into the system (something that crypto was meant to avoid in the first place). You don't need to provide personally-identifiable to use Bitcoin or any other cryptocurrency, so why should any decentralized exchange do the same? Centralized exchanges require KYC simply because they have a moral obligation to do so. Going against what was established by the government would mean shutting down their business for good.
While centralization is a dominating force in crypto land, there are still decentralized alternatives out there anyone can use without restrictions. As long as this is the case, there should be nothing to worry about. Just my thoughts