I was in Hermosa Beach last week. Manhattan Beach is next to Hermosa Beach, and when I was there the police were aggressively enforcing the speed limit on the beachfront path ("aggressively" = stopping almost all riders going more than 5 over the limit). Nearly all the pulled-over users seemed to be tweens / early teens on Class 2-3 e-bikes.

Riders and e-bike riders completely ignoring traffic control seems to be endemic across many states. I almost had a head-on collision Friday with a fast, unlit, and very angry wrong-way rider.