Cabal in my Neighborhood?

I observed an old white man with his right pant leg rolled up talking to the construction foreman on the job site at my complex. When he saw me look at him, he took off on a bike. I've never seen him or the bike in 22 years even though he claims to live here. Maybe he does, but I definitely never saw him on his bike which is impossible because I'm out and about the neighborhood almost every day. Anyways, I chased him down and confronted him. The hair on the back of my neck stood up as I started to see he was a very disingenuous fellow. What was he scheming against me? What signal of solidarity was the right pant leg demonstrating allegiance to?