I only know of one major incident to which the article refers - on I-270 at New Halls Ferry Road. This would have to be after 3:30pm, because that’s when I saw them all heading north.
MoDOT even put a warning on our digital signs - MOTORCYCLES EVERYWHERE PLEASE USE CAUTION.
One valid police response could be a curfew on motorcycles. Another is impoundment of all motorcycles with plates id’d by cameras.
I what call this a fairly serious public safety event even if only one accident happened, as it creates a very bad example. Come down hard on it, fast, and early.