This is not what these flags are for. You are free to leave ratings on his profile if you insist, but this is also frowned upon unless the intent is to prevent fraud. This has nothing to do with fraud and is just retribution for a disagreement, righteous or otherwise. You can not use flags like this because it devalues the entire rating system. This is an invalid flag that reflects more poorly on its creator than its target.
Funny I don't recall you (or anyone for that matter) making this beautifully virtuous and enlightened comment when Timelord2067 just the other day opened not 1 but 7 abusive flags that "devalue the entire rating system"
How would you suggest I should respond, when there is blatantly obvious double standards and highly selective treatment going on, to the complete detriment of the local section participants of the forum, who have not, as of yet (and also because of lack of interest for the incessant dramas) been very active in meta & reputation...