Common Stack Network policy is to embrace non-Googlers. The Stack Exchange wants to be a place Google sends folks, not a place that sends folks to Google.
While obviously there's no way to control folks' voting habits--and there shouldn't be!--I think it's useful to establish where lit.se hopes to come down on this subject as a community. Specifically:
If we embrace non-Googlers, what level of effort is sufficient for avoiding mass downvotes? For example, on scifi.se they determined reading/watching material is not necessary effort in order to ask questions about it. If we adopt that, then "Did not read the book before asking" isn't a reason to downvote.