Has it been shown that screaming drugged out homeless riders avoid the presence of crowds? Is there any physical mechanism where having more people on the trains leads to Daniel-Penny-like suppression of drugged out homeless riders? Or does "getting more people onto the trains" just mean removing their options until they are forced to ignore the drugged out homeless riders?

As a solution, "get MORE people onto the trains" seems less optimal than "get fewer drugged out homeless riders onto the trains".