How big do you think the web-based malware problem is? How many sites do you think were hacked and/or infected with malware in the last 6 months? How many of those got blacklisted by Google?
The numbers could have been better for the Alexa Top 100K Sites. This problem extends well beyond the Alexa top site listings, but we wanted to put into perspective that this is a widely spread problem affecting even the most popular of sites.
Just in the last 6 months, more than 1% of the top 1 million sites (according to Alexa) were blacklisted by Google. That’s a total of 10,494 sites.
The thing to consider here is that Google has had accuracy problems in the detecting malware arena (also with blackhat seo spam detection), so there’s a great chance that the total numbers are in fact higher than being reported here.