That's the thing: Almost all teams refuse to acknowledge it. It's like Steroids in 90's and 2000's MLB. Everyone knows it, and everyone plays dumb.
Calling guys like AB dog sh*t is an insult to canine fecal matter. The Steelers and Raiders knew what kind of guy AB was and did nothing to slow him down. The Pats are continuing that behavior. No one in the NFL has clean hands on this one.