Look for someone, something "just not right" in the pictures you view...like someone hurrying just a bit more...
This gave me a dozen different looks in a flash...
Brown jacket - glasses - hat.
Brown jacket - no glasses - no hat.
Tan jacket - shades - no hat.
Tan jacket - hat - no glasses.....
I also got pretty good at changing my height and walk.
I work a couple of blocks away. Times square has extremely sophisticated surveillance equipment. Also a recruiting station. Always a heavy police presence - every day. This past week the swat cops and police dogs are all over Penn station and the subways. I find it hard to believe none of the cameras picked him up.