Here is good advice...wonder if Jason Bourne taught them??

http://www.wikihow.com/Avoid-Being-Picked-Out-in-a-Crowd

How to Avoid Being Picked Out in a Crowd

In public, you may need to conceal yourself in a crowd. Criminals especially will attempt to pick you out from a crowd to be targeted. The purpose of this guide is to make you as invisible to the public eye as possible.

Steps

1

Don't try to stand out. If you have the mentality that you want to stand out, then you will. You won't blend in to the crowd if you are making a scene. Blending in is 50% mental.

  http://www.wikihow.com/Avoid-Being-Picked-Out-in-a-Crowd