So they are using a form of harassment? Get them to look at the cost of sending someone vs just betraying one user. Of course the blowback as reddit shows it would betray your anonymity could be a pr disaster.

If the article is correct then the whole demand is truly bizarre. There seems to be nothing in the reddit user’s postings to warrant this amount of concern. The fact that his comments are innocuous may be to set a precedent that any criticism, regardless of severity, can be prosecuted or at least intimidation.