There’s a new trend in webspam: mass free blogs with scrapped content a.k.a. splogs. Google takes this very seriously and they started to delete all blogspot sites involved in this. They use SMS verification. But there are thousands free WordPress MU providers that can’t afford a SMS system.
The blogs generated by robots are easily blocked using captcha. But what can you do when someone hires a couple of people to do everything manually? Yes, in 2011 there are people which have this kind of jobs. Over the last years, these spammers have improved and perfected their techniques by using thousands of IP address from compromised machines.
|Stop Forum Spam||44% spammers blocked||0% false positive|
|Wangguard||40% spammers blocked||0% false positive|
|Akismet||16% spammers blocked||0% false positive|
|DNSBL||36% spammers blocked||14% false positive|
|Akis+Wang+SFS||66% spammers blocked||0% false positive|
Anti-Splog has not been tested because it requires WPMU DEV membership. If someone wants to contribute with this please comment/contact.