In the book called, "The Outsiders", does Ponyboy exhibit "herd behavior" and is he like the other greasers?

Yes, initially Ponyboy exhibits herd behaviors

Explanation

Ponyboy belongs to a group of greaser gang while with this group, he leans the value of friends and family based on his conflicts with the bands.

The herd behavior is commonly seen during times of war and danger.

For instance, fire, suspension as well as free in the park are the common causes of herd behavior.

When people are in a crisis like a Ponyboy, they tend to move faster, copy others behaviors and strategies for more comfortable escape and that what happened to him.