This is off the topic of this article (don't know where else to express this).
Initially I liked the idea of 'peer reviews',but now it's a bit irritating.
I don't really want to spend hours on these threads. For every comment I make , I have to read through two or three other comments,and vote. 
Not to mention, some comments and what they're replying to aren't clear enough unless I read the whole article and/or the comment they are replying to. Does anyone feel the same way? Is there anothe system you can use?
Can you just make it optional if one wants to 'grade' someone else's comment?
Why is it mandatory? What is the point?
Not trying to be difficult, but it does seem like wasted time reading through other comments from other articles