You have to wonder how mad Lane Johnson would be at the Patriots if his team lost the Super Bowl, especially if the New England scored a TD on a play that could have been called back due to penalty. He'd make the 2001 Raiders and Rams players seem respectful and magnanimous.
I could see being emotional and still fired up about the game back in February, but 3 months later is a kind of obsessive. I don't recall anyone from, say, the Broncos still talking trash about the Panthers months after SB 50.
A little anecdote about Johnson: I was reading tweets from Patriots fans I follow about a month ago and there was an exchange where one person mentioned Johnson. I forget exactly what they said, it was probably like "You could be a sore winner like Lane Johnson." It's not a compliment, but it's also not vulgar or hugely insulting. They also didn't "@" Johnson, they just mentioned his name. Anyway, not too long after that tweet went out, Johnson himself posts in the thread, insulting those guys. Lane Johnson searches Twitter for anyone mentioning his name and possibly saying something negative about him.