Admin ajax calls slowing server for this plugin

1. 14 502 “POST /wp-admin/admin-ajax.php

2. Source of the admin ajax calls: fbc_ping with 22 hits per 30 seconds and growing.

3. finding the source of fbc_ping call is the following information…

wp-content/plugins/fatpanda-facebook-comments/comments.php
18: action: 'fbc_ping',

wp-content/plugins/fatpanda-facebook-comments/plugin.php
16: const META_PING = '_fbc_pinged';
48: add_action('wp_ajax_fbc_ping', array($this, 'ping'));
49: add_action('wp_ajax_nopriv_fbc_ping', array($this, 'ping'));

Can you tell me if I can just disable the ajax calls from the plugin? If yes, what do these ajax calls actually do?

Thanks,
Marton