I have to agree with Fluffy that Drifter (the anon caller) should not have engaged in this behavior. Making such telephone calls with the intent to harass or annoy (or recklessly creating a risk of harassing or annoying) is criminal in most states. It is generally not a serious offense (class c misdemeanor in my state) but, considering each call is a separate offense, the consequences can be serious. (We sometimes see hundreds of harassing calls from irate ex lovers, unsatisfied customers, etc).
It appears that Drifter's actions, while criminal, were on the less serious end of the spectrum and the court's admonition appropriately addressed the situation. Drifter admitted the foolishness of his actions and promised the court that it would not be repeated. This is the type of behavior that we should expect from a person that has done something wrong. I don't see this as a 'win' for either anonymous or the church.
Fluffy's point, which I agree with, is that in dealing with members of the church, we need to remind ourselves that they have no sense of humor. Things that are funny in the real world take on a life and death seriousness in the myopic vision of a scientologist. Most current scientologists will soon be ex scientologists and hopefully regain a sense of humor. Until that time, when protesting the church, we should try to stay well within the envelope of legal behavior.