Probably a one off, or at least not something that happens on a scheduled basis. There have been many event rounds that have never been repeated. Like… when the Queen of England came aboard, and then she turned out to be an international criminal and shot the place up.
Or one round years ago I recall, where a number of the shipside crew, myself included as CO, were made synthetics without the rest of the crew knowing, and we had to conceal our true nature or else be purged. There was a special MP force sent to scan members of the crew to find the synths.