shoutsDuplicados.user.js

function deleteDuplicates(){
	var shouts = $('#Feed-list > .activity-element > .clearfix.shout-footer > .s-action-list').map((i,e)=>{ 	
		return ( $(e).attr('data-id') )
	}).toArray();

	var duplicated = shouts.filter( (elem, index, arr) => arr.indexOf(elem) !== index );

	duplicated.forEach((shout)=>{
		$("#Feed-list > .activity-element > .clearfix.shout-footer > div[data-id="+shout+"]").each((i,e)=>{
			if(i===0)
				return;
			$(e).parent().parent()[0].remove()
		});
	})
}

deleteDuplicates();

$(document).ajaxSuccess(function(event, jqXHR, settings) {
   	if (settings.url.indexOf('ajax/feed/fetch') > -1 || settings.url.indexOf('serv/more/trend') > -1)
       	deleteDuplicates();
   	
});