从访客统计数据中消除虚假流量的有效方法？

Question

我正在制作自己的网络统计信息脚本。

成功淘汰了许多机器人。问题只有推特，当我立即发布链接时，我看到 20-30次访问我怀疑是 cURL /未知蜘蛛

检测此类访问者的有效方法是什么？我想改善访客统计数据。

P.S。这些访问者不会在Google Analytics中报告/看到，对于机器人我会从统计信息中删除这些用户代理：

<?php 
array(
    "Butterfly","Twitturls","Me.dium","Twiceler","facebookexternalhit",
    "Teoma", "alexa", "froogle", "Gigabot", "inktomi",
    "looksmart", "URL_Spider_SQL", "Firefly", "NationalDirectory",
    "Ask Jeeves", "TECNOSEEK", "InfoSeek", "WebFindBot", "girafabot",
    "crawler", "www.galaxy.com", "Googlebot", "Scooter", "Slurp",
    "msnbot", "appie", "FAST", "WebBug", "Spade", "ZyBorg", "rabaz",
    "Baiduspider", "Feedfetcher-Google", "TechnoratiSnoop", "Rankivabot",
    "Mediapartners-Google", "Sogou web spider", "WebAlta Crawler","TweetmemeBot"
    );
?>

由于