They’re Ba-a-a-ack!

In this Nov. 13, 2011, file photo, referee Scott Green makes a call in the second half of an NFL football game between the Seattle Seahawks and Baltimore Ravens in Seattle. The NFL and referees’ union reached a tentative agreement on Wednesday to end a three-month lockout that triggered a wave of frustration and anger over replacement officials and threatened to disrupt the rest of the season. (AP Photo/Elaine Thompson, File)

“Protocol question: When does the honeymoon period with the real NFL refs end? When will it be OK to yell at them to pull their heads out?” — opinionator Kevin Richert, Idaho Statesman, via Twitter.

Question: Have you ever literally booed a referee or umpire? I have  ;-)