If you are worried about this accidentally happening to you, realize that under normal circumstances, there are many safeguards in place to prevent mishaps.
I can’t speak for these free-standing MRI outpatient clinics.
But as a retired medical coder who worked in the hospital environment for years, the levels of safety are numerous.
As a potential patient who will need to get an MRI, you are asked numerous questions to verify if you have any metal objects in your body or on your clothes. In some places, you are asked to change in to safe hospital provided garments with no metal. Women are told remove their bras. You take off rings and any other jewelry. In some places, they utilize metal detectors. If your fillings are an issue, it will be determined how to proceed. I thought fillings were made with non-metal components. Not sure about gold. It is metal tho! Right?
Now, continuing on with my scenario: As a casual person who accompanied the MRI patient, you would not be allowed anywhere near the suite. There is signage, humans and physical barriers like locked doors to limit unauthorized access.
I think this specific incident COULD have been because they didn’t have adequate safe guards to keep people out of the suite. But, I can’t say for sure. Once back up and running, I’m sure this free-standing clinic will be operating a tighter ship. Possibly with a few new staff to replace some staff who might have been let go. 
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