To this day, only AI war has fared well on metacritic.
I wish I could say don't worry about it, but in practice for any game if I see it below 70, I pass. Simply don't have enough time to begin with, so don't investigate games that are a mixed bag when so many are universally appealing. That said, I only view actual reviews, and the one review is a good one.
Kinda the opposite for me: If I see a low-scoring game, I'll immediately look into it more. Quite often, doing this has led me to good results (as in, a game I end up liking alot). To be fair though, I'm pretty much interested in indie titles mostly, and almost always I'm playing the genres or types of games that more "mainstream" gamers literally dont understand very well in many cases (and thus instantly give bad reviews to, even if their complaints make less than no sense), so that's at least a small part of it. It can happen for any game in any genre though.
This though is if I bother to look at the number. Usually I dont, simply knowing that people can rate it badly if their damn machine has a seizure for a seperate reason, or simply because they're being a troll.... It reminds me of reviews on GameFAQs from random forumites, where the reasoning can range from "Okay, that makes sense" to "What in the world did I even just read?".
Though I will admit, the whole thing DOES have comedy value to it, some of the reviews being what they are.