I was walking down the street with my friend, and this guy who threatened me last year (a teacher got fired and the seniors from last year thought it was my fault; he's the only one that gives two shits nowadays) walked by and said "Watch yourself Hector." (Hector is my first name). So obviously I'm supposed to be scared.
I would watch it too. I hear the manga was an artistic masterpiece, so I am aiming for the show to be anime of the year.
In that case it's probably best just to keep ignoring him, lol. If he's been giving empty threats for this long, he's likely the one that's really scared to do something.