It's beyond the scope of XenForo 1.0 to fix this, as we currently treat robots the same as other guests. However, a framework is in place to resolve this in the future, and we will do so for XenForo 1.1.
So now that 1.1 is out, is this still planned for sometime in the future? I've been thinking about making an addon for it I just don't want to and then it be part of the framework in like a month or so.