What immediately bugs you when watching an episode? Mine is when they transport someone sitting down and they reintegrate in a standing position (or vice versa). Sure, the tech is near magical but my suspension of disbelief pretty much snaps when they do this.
I feel like the idea is their scans are so comprehensive as to make it unnecessary. You would think considering how often the scans fail they would do it but its been awhile so the question in my head is how soon the thing shows up. Im almost sure there have been some that are quick but others that such precautions would still not catch. All the same it would have been good for it to have taken either a real long time in every instance or required some interaction with something to activate it or something.