code: @Override
      public void reportSpam(final long userId) {
          getDispatcher().invokeLater(new AsyncTask(REPORT_SPAM, listeners) {
              @Override
              public void invoke(List<TwitterListener> listeners) throws TwitterException {
                  User user = twitter.reportSpam(userId);
                  for (TwitterListener listener : listeners) {
                      try {
                          listener.reportedSpam(user);
                      } catch (Exception e) {
                          logger.warn("Exception at reportSpam", e);
                      }
                  }
              }
          });
      }
docs: /* Spam Reporting Resources