Well done! I love this picture and your "Snarky" comment.
I just dare you to make a little sign to hang below it which reads;
TRAIL MONITORED BY AERIAL PATROLS, RADAR, AND UNDERCOVER OFFICERS
Or some other Snarky comment!
Although, as you and others describe trail riding in an urban area, I guess I can understand why a trail would be posted.
Our local Rail Trail, which is packed fine gravel, now goes nearly 60 miles. My last ride on it I passed 1 rider, and two couples, in 25 miles.