Mass-block users on Twitter

block.js

(async function()
{
  let data = new URLSearchParams();
  data.set("authenticity_token", document.getElementById("authenticity_token").value);
  data.set("challenges_passed", "false");
  data.set("handles_challenges", "1");
  data.set("impression_id", "");
  for (let element of document.getElementsByClassName("js-actionable-user"))
  {
    data.set("user_id", element.getAttribute("data-user-id"));
    await fetch("https://twitter.com/i/user/block", {
      method: "POST",
      body: data,
      headers: {
        "X-Requested-With": "XMLHttpRequest",
        "X-Twitter-Active-User": "yes"
      }
    });
  }
})();