Mark dude...
People these days buy ANYTHING they see on the shelves at video stores, including stuff that is so friggin trivial that you'd be surprised anyone would even touch it. Such a huge portion of the video market is comprised of people that are bored. It's not too much of a stretch that people would see it and think "Well, I've never seen that before, that looks cool..." Or "No, sweetie, we are NOT watching Titanic or Braveheart again for the 50th time this week!!! We'll watch...we'll watch...<looks around>...uh, Push, yeah, that's it, we'll watch Push tonight! What is it? Uh, it's...it's...another romantic comedy movie! Yeah, that's it! Push it is!"
Yes, this is how most decisions in video rental stores go. Believe me, I hang out in them a lot. Movie popcorn is too damn addictive...