If you are worrying about someone using the data that you are posting online then you should probably rethink whether you want to post it in the first place. If you are posting/sending personal data then it should always be encrypted anyway. Theymos has shown at least that hes only willing to release data that he has to because of the law but is not going to release data he thinks is irrelevant. I think in the past he has released information only on big cases such as the silkroad messages.
If someone has been harmed and they report it to the police, that might be enough to convince theymos to release information that could benefit an investigation. For victimless crimes afaik theymos will only cooperate when legally bound to (e.g. a valid US court order).