There is a line to be walked. Having a gun that never runs out of bullets doesn't fly in most movies, even if they'll fudge exactly how many are fired before a reload. This is due to the general public's level of knowledge on the topic.
It used to be very annoying to watch certain parts of movies when I was younger. Computers and the internet were treated so haphazardly, it was cause for celebration whenever a contemporary computer interface was shown that wasn't entirely bullshit. This isn't relegated to just these topics, I assume there's a wide swath of annoying Hollywood misrepresentations on topics where there's a sizable subculture, and interest enough to sometimes be included in popular media, but with enough obscurity to the general public that Hollywood can basically make up whatever they want about it and most people won't know any better. For example, I imagine a good majority of car chases and slides around turns probably look like crap to stunt and race drivers, professional and amateur.
The effects of this range fro harmless to possibly shifting popular consensus in harmful directions (I could argue that a lot of early fear regarding the internet was misplaced, and the expectations of the public were so off that it may have retarded some basic security awareness for some time).
The annoying part is that all too often it's just a small matter of knowledge that keeps the representation from matching reality, and the only thing that stopped it from happening was a lack of care on the director's part for the subject they were representing. That's what the real shame is, because how hard is it for a director to get someone to sit in and consult on those topics?