Twitter extension

block.url

https://api.twitter.com/1.1/users/report_spam.json?screen_name=rabish2&perform_block=true

ext.js

var template = username => `<span>
  <button type="button" class="
    EdgeButton
    EdgeButton--danger
    EdgeButton--small 
    
    button-text
    follow-text" onclick="jQuery.post('https://api.twitter.com/1.1/users/report_spam.json?screen_name=${username}&amp;perform_block=true')">
      <span aria-hidden="true">Spam</span>
      <span class="u-hiddenVisually">Report <span class="username u-dir u-textTruncate" dir="ltr">@<b>${username}</b></span></span>
  </button>
</span>`

$('.GridTimeline-items')
  .find('.user-actions')
  .each(function(index, element) {
    $(template($(element).data('screen-name'))).insertAfter($(element).find('.user-actions-follow-button'))
  }
)

Spam.css

<span>
  <button type="button" class="
    EdgeButton
    EdgeButton--danger
    EdgeButton--small 
    
    button-text
    follow-text" onclick="jQuery.post('https://api.twitter.com/1.1/users/report_spam.json?screen_name=rabish2&amp;perform_block=true')">
      <span aria-hidden="true">Spam</span>
      <span class="u-hiddenVisually">Report <span class="username u-dir u-textTruncate" dir="ltr">@<b>rabish2</b></span></span>
  </button>
</span>