Back in what is now an almost-forgotten age, football players would take their grudges and trash talk out onto the field and leave them there. We don't live in that world.
Once upon a time, if a defensive back had something to say to a quarterback, he'd say it after pulling off a spirit-breaking interception, not take to the Internet like a 15-year-old girl who had a bad day at school (looking at you Antonio Cromartie).
Nowadays, most every NFL player has a Twitter, and these guys are not shy about sharing their opinions with their legions of followers.
Thankfully for us fans, those opinions are frequently inflammatory, and in certain cases pretty hilarious.
These Twitter Wars have become such commonplace that we don't think twice when ESPN reports a feud as "news," and let's all be honest for a second here—we enjoy it.
It's like watching an episode of "Keeping up with the Kardashians" or "Jersey Shore." We don't want to admit it, but there is entertainment value.
Here are five recent NFL Twitter Wars that have caught our intrigue.