Art of the flamer

I’ve been using the internet since my grade 10 year… after purchasing an account from www.io.org many years ago. “Internet Online” was the company name.
I’ve always seem flamers/trolls just general jackasses that most are accustomed to. These people would never say the things they do online… the anonymity is the trouble. What fear do they have? Maybe if we post everyone’s IP that post the crap they do.
I know I’ve done it in the past… maybe it’s just a bad day, who knows.