I think most who receive an illegitimate - get it removed pretty easily on their own just by bringing their cases to the public..
The ones that have a harder time are the ones that have language problems and/or have no concept of proofs. Still members seem to drag the relevant intel out of them..

You may find some cases where you could establish reasonable doubt but reasonable doubt doesn't really mean someone should remove their rating.. It might work for DT though because they can't really get away with destroying people based on their feelings alone..

I think it will be hard for you to find cases because those that deserve removal are pretty rare.. Evidence by you not having found a case yet..

You could cruise the scam accusations and reputation boards or something looking for clients like an ambulance chaser, offer your services..

Keep it interesting