As has been suggested, its best to just file a report if you really feel that something is off. We will be acting in a stricter fashion for these sorts of reports and would likely take immediate action if the evidence against them is undisputable (such as taking direct hits without significant damage and having win/loss ratio that does not match up). Otherwise, we may await to receive further reports in order to mount evidence against a user.
In addition, our team is working on separate security measures to help counter hacks from being used.
-Randy