[pct-l] where to report motorbike trail abuse?

[phix at optigan.com (Pea Hicks)]

hi all-

the other day in the tehachapi's, i managed to get the first 4 digits 
off the license plate of a motorbiker openly and defiantly riding on the 
pct... can anyone tell me if this might be sufficient to report him, and 
if so where should i submit the info? or is it not even worth bothering 
with at all?

girl scout