I've definitely over heard "Cars are front heavy, they would never make that jump!" and "There's no way it would explode like that!". Whether or not they were engineers or gear heads uttering those lines is unknown, but I do think it is pretty common to point out where Hollywood has let you down in it's depiction of something you are passionate about. Even if it IS only a mechanism we as animals use to say "Hey! I know about <computers, cars, semi-automatic weapons>, ask me about it!"

The thing you have to remember about the internet, is that we're all really just kind of running loose in a programmers perpetually beta playground. Things here will always be slightly skewed towards technology and those who can use it.

All that said, one of my school projects was based around the short story "Burning Chrome" by Gibson. We recreated the trademark "over the shoulder view of a monochrome monitor in a poorly lit room" shot to show our hacker "hacking" a little BASIC program we wrote that consisted of 3 labeled bank accounts and a prompt for "Which account would you like to withdraw from?". We of course knew we were pandering, but the class ate it up, and we got an A.