hotentry_cleaner.user.js

// ==UserScript==
// @name           hotentry_cleaner
// @namespace      hotentry_cleaner
// @include        http://b.hatena.ne.jp/*
// ==/UserScript==

(function() {

//TODO
//Input tags you want to eliminate them from Hatena Bookmark hotentry pages.
//In default, entries which were tagged as Facebook, iPhone and iPad will be eliminated.
var ngtags = ['facebook', 'iphone', 'ipad'];

function lowerAll(strings){
	result = [];
	for(var i = 0; i < strings.length; i++){
		result[i] = strings[i].toLowerCase();	
	}
	return result;
}

function findEntries(){
	var xp = '//ul[contains(concat(" ",normalize-space(@class)," "), " hotentry ")]/li';
	var entries = document.evaluate(xp, document, null, XPathResult.ANY_TYPE, null);

	return entries;
}

function isInclude(entry, ngtags){
	var xp = "div/ul/li[2]/a";
	var tags = document.evaluate(xp, entry, null, XPathResult.ANY_TYPE, null);

	var tag = tags.iterateNext();
	while(tag){
		for(var i = 0; i < ngtags.length; i++){
			if(tag.innerHTML.toLowerCase() == ngtags[i]){
				return true;
			}
		}
		tag = tags.iterateNext();
	}

	return false;
}

function evaluateEntries(entries){
	var entry = entries.iterateNext();
	var eliminates = [];
	while(entry){
		if(isInclude(entry, ngtags)){
			eliminates.push(entry);
		}

		entry = entries.iterateNext();
	}

	return eliminates;
}

function eliminateEntries(entries){
	for(var i = 0; i < eliminates.length; i++){
		eliminates[i].style.display = "none";
	}
}

ngtags = lowerAll(ngtags);
var entries = findEntries();
var eliminates = evaluateEntries(entries);
eliminateEntries(eliminates);

})();

特定のタグが付いたホッテントリを非表示にするGreasemonkeyスクリプト
http://d.hatena.ne.jp/kokutoto/20101014/p1