It is not legitimate to keep deleting and reposting negative ratings to put the system back into "this guy just turned scammer!" mode. People who do that shouldn't be trusted.
Looks like this is what Wardrick is doing.

Second time he deleted then re-added the same feedback to keep TSP in the ? ? ?.
Wardrick, please read below what is considered acceptable behavior with what you are doing:
In summary, for people who previously had many positives and no negatives:
- The first negative rating defines a border between pre-controversy and post-controversy.
- Don't move this border unless you have a really good reason. If you must add more info, leave another negative or neutral rating.
- If you agree with the border-negative, leave a negative rating.
- If you disagree with the border-negative, leave a positive rating responding to the negative, even if you already have a positive rating for that person. Don't delete your old rating. You should also consider excluding the inaccurate-rater from your trust list.