Always take technology in fiction with a pinch of salt, the public has a basic idea - and bias - of what is plausible with technology. As such plots, props and SFX are designed to appease this idea, not change it with reality.
Edited to add: If there was a way to do this - which I'm sure is possible given enough time and resources, the question is.. why would someone do this? Lots of things are technically possible, but people don't do them because there isn't much point. Some have the will, but not the way, many have the way, but not the will. Very few have both.