Hmm... Well I just worked out a storyline for my game's first major plot that involves supernatural areas of darkness all over the city and people disappearing into them.
The way the PCs are to find out about this happening involves one girl disappearing into a "dark-spot" as she is walking down a sidewalk next to a bank which catches her disappearance on CCTV... So I was assuming that it would work even though normally, something like that would indeed hex electronics.
Then again, if I had "dark-spots" all over the city hexing electronics, that would change the tone of the happenings as the mundanes would be more interested and it would seem less spooky.
So while what's been said so far is a good rule of thumb, I try to remember my friend Danny's approach to RPing when it comes to high story games like Fate-based DFRPG...
"If it looks good for the movie..." go with it.
This works best on things like these where it's a gray area, as opposed to breaking the maxims of the verse which I try not to ever do...
And I know 'Science fails' is a maxim, which is why I say...
But CCTV has captured supernatural juju in the books... So fair game imo to do the same.
Just like everyone said, make it sketchy.
In mine, no one will be able to tell what happens. The girl just walks into a dark area (maybe some glitchy/static noise) and is...gone. She doesn't come out the other side. Period.
So it still fits the maxim and it fits what I need... and it looks good for the movie.
Good luck!