Already happening in the Bay Area, or was before covid. They have a big open air concert in Golden Gate Park, called Outside Lands - the concert goers were being mugged going and and going out by the usual suspects for their phones and cameras. The media just tsk tsk'ed it away. The year Metallica headlined, they tried to blame it on "violent heavy metal fans".

You don't need to bus them in - they're already showing up.