I’ve read them. For laughs, mostly.
I think some people vow: “I will write the best WORST review ever. My angry minority opinion will be more popular than their book ever could be!”
Are any of the gripes legitimate? Maybe. However, two missing elements derail many hatchet jobs.
1. Not saying WHY. Why does the book suck? Because you don’t like it. That’s it? No details? Build your case, prosecuting reviewer.
2. No alternatives. In other words, how would you have done it differently? How would you have made the creation better?
Online. In print. Any review anywhere would be better with these two elements. In fact, as you review your own writing, address those two questions fast.
If you don’t, the Internet trolls will.