17. Conor McGregor
No stranger to criminal behavior, McGregor sank to a new low in 2019 when he socked an old man in a bar. Why did he assault his fellow patron? It was for the most foolish reason as the man rejected a free shot of McGregor’s Proper Twelve brand of whiskey. The older man turned it down and received a punch to the face in thanks. Needless to say, McGregor experienced the disgust of the world because it was such a cheap thing to do.

“I would rather get sucker-punched in the face by Conor McGregor than take a shot of his cheap but overpriced whiskey. The old man made the right decision, and Conor McGregor should be in prison,” @JimnBL tweeted. Instead, the Irishman received a heavy fine and made a groveling apology on ESPN. But it was obviously a horrible moment for the MMA community and disappointing from McGregor.