Inspired by the linked XKCD. Using 60% instead of 50% because that's an easy filter to apply on rottentomatoes.
I'll go first: I think "Sherlock Holmes: A game of Shadows" was awesome, from the plot to the characters ,and especially how they used screen-play to highlight how Sherlocks head works in these absurd ways.
What!? Hackers at 31%? The one with young Angelina Jolie? The critics gotta be some uncultured swine. That movie was gold! It was The Matrix type of cool before The Matrix. It put the punk part into cyberpunk for a lot of kids.
Also its a bad influence: Got kids inspired to learn about phreaking and phone systems.
Hackers, absolute gold! People like to crap all over it because it's not realistic, but the vibe of it really fits the hacking scene. Another similar movie, that has some pretty cool hacking vibe, but people also crap all over is Swordfish, 26% tomatoes, 59% audience.
almost no movie has realistic hacking, but i always thought "Hackers" was pretty spot on (for example with the phone phreaking, social engineering).
When i think about movies with unrealistic hacking scenes the following come to mind:
"The Core" has a scene where "rat" whistles into a mobile phone to get free long distance calls (wrong time period)
in "Skyfall" they look through a hex dump and find non-hex characters
To me, the worst offender is the pocket sized brute force device that displays one character at a time as it figures out a door passcodes.
On any reasonbly secure system, it would try 15 combinations and the doors would lock and an alarm would sound.
When I write a password checker that awards partial credit, I will be fired immediately for gross incompetence.
Door security systems are frequently the weak point in an otherwise modern system, and the pocket flashy device is actually unrealistically slow in letting the hacker in. An instant happy beep and a green light and an unlocked door would be more realistic.
That said, a surprisingly high quality hacker movie is "Sneakers".