I am sorry if this was posted already but it has been bugging me for a while.

I see a lot of trusted users having negative ratings as well. But not because they are scammers, abusers of rules of any kind but because they did what they thought was right and gave negative ratings to a scammer/spammer/rule abuser...

My questions is this. If I give a negative rating to another user for a reason I think is justified and in return that same user gives me a negative rating as a retaliation what do the forum moderators do in this case, or better how do we deal with such issues?

I cant say for a fact but it seems that is happening quite a lot.
User A gives a negative rating to user B for selling fake software for example. After that user B retaliates and gives user A a negative rating as well and that rating stays with user A forever.
It doesnt seem fair to me. Can a user involve an admin if he thinks he received a fake review and can the admin delete that review?

I think if they could it would benefit the community as trusted members wouldn't end up getting fake reviews that mess up their accounts.