Sadly, irrelevant reviews is just something that people do these days, seemingly without even realizing that they're review is irrelevant. It's not just for movies, you see it all of the time on Amazon these days. I don't know how many times someone leaves a negative review for a given product that has absolutely nothing to do with the actual product. Delivery was late, bad review. Package was dinged, bad review, Poor customer service, bad review. Just like the complaints about the theater, this sort of thing tells me exactly nothing about the product or movie in question. If you have a complaint about something other than the product or movie, then post it elsewhere and not in the review section.
Speaking of irrelevant reviews, my wife one saw a review on Yelp for a local Mexican restaurant that used to be called Mayan Taco. and in that review some person complained that they didn't serve actual Mayan food. As if Mayan cuisine is a common thing in the US and tacos are a part of it. It's idiots like that who are posting all of the irrelevant and dumb reviews of things these days and are bringing down our collective IQs to boot.