incrediBILL - 10:02 am on Nov 4, 2013 (gmt 0)
FWIW, back in the day I had some arguments with Google that they should block certain queries that the hackers were using to find WordPress sites of specific versions after encountering some botnet scripts used to scrape Google SERPs for those terms.
For some reason the brain trust in Mtn. View didn't seem to understand that those sites weren't easy to find until someone started providing the results to queries like "Powered by WordPress x.y".
The bigger argument that finally persuaded them to take action at the time was that MSN was already blocking those search terms.
So while WordPress security is definitely an issue, I think a lot of responsibility also falls on the search engines to make sure they aren't just handing over easily compromised sites to any botnet querying for specific versions and crawling all the search results.
Limiting the number of responses to such queries is at a minimum the best compromise as there's no reason to allow anyone to harvest a list of thousands of sites to hack.