<xen:hook name="message_user_info_avatar" params="{xen:array 'user={$user}', 'isQuickReply={$isQuickReply}'}">
<div class="avatarHolder">
<xen:if is="{$user.is_banned}">
<a href="{xen:link members, $user}" class="avatar Av{$user.user_id}m" data-avatarHtml="true"><span class="img m" style="background-image: url('PATH/TO/BANNEDIMAGE.GIF')"></span></a>
<xen:else />
<xen:avatar user="$user" size="m" />
<!-- slot: message_user_info_avatar -->
</xen:if>
</div>
</xen:hook>