Re: How Did You Do It?
Indeed, there are hundreds (maybe thousands?) of movies that could easily have been part of this list. If you nitpick enough, relatively few movies fully pass technical muster.
Granted, I (and think many of us) could care less about the "reality" of on-screen tech; internal logic, even if fantastical, can be more important than real-world "realism" (e.g. the majority of Marvel movies). Moreover, as long as something "feels" real, that phenomenological experience is often more important than the accuracy of technical minutiae (e.g. I've heard physicists pick apart Gravity's errors, but on an experiential level, I don't think many viewers cared). Despite their tech flubs, I love several movies on this list-- not just for nostalgic appeal, but because they're genuinely good pieces of cinema.
I tried to pick a few infamous examples of bad tech in movies, a few less-known ones in which a tech plot hole is too big to ignore, a few in which the filmmakers really should have known better, and a few that are just silly. Not a comprehensive collection, by any means. For that, I don't think an online list would suffice; I'd need to write a couple books!
Any other particularly egregious examples of bad movie tech that some of your readers would have included?