This sounds like a knee-jerk reaction that doesn't take into consideration the ramifactions of the suggested policy. It won't stop DDoS attacks, because those exist _because the internet exists_ and unless you dismantle the very concept of interconnected "everyone can reach everyone" networking, all you're doing is locking down access to more and more people until only technical experts or the people with enough money to hire those experts get to use it.
Advocate the other direction: more freedom, including the freedom to say "thank you, browser, for being locked down by default, but I trust this website and I am okay with everything it wants to do".
Instead of locking the web down, let's give users the freedom to put on or remove as many locks as they want to live with. And letting make mistakes with that, too: you don't make things better by taking away important life lessons, either.