Sgt_Kickaxe - 3:07 am on Oct 13, 2012 (gmt 0)
I wouldn't block search engines as it will inconvenience your visitors, not yet anyway. If Google stops sending those visitors in favor of their own knowledge however then I'll seriously reconsider. I still can't wrap my head around how they can assimilate all of the worlds knowledge from others and slap the Google name on it, and get away with it, so for now we can just wait and see, and hope for the best. Google is facing anti-trust suits in many countries now so it may be some time before we can clearly see what they are doing, it's possible they don't even know for sure at this point.
Always focus on your visitors!