Unless you believe in a massive world-wide conspiracy of government coverups, I do not see any evidence of "tagging", as if the ALFs are practicing "catch & release".
Unless the ALFs are doing it for environmental monitoring, I would suspect that they can clone previous "samples", obviating the need for continually revisiting this planet.
And speaking of Art Bell, he has Steven Greer on tonight.
Still, there is that nagging serendipity of the timing of that "Fire in the Sky" abduction.