Sometimes you get a general idea of what's going to happen based on what they say. I reported someone a few weeks ago and in their reply they said they received multiple reports about the "same issue" or something to that effect, and based on that person's page on the Lodestone it doesn't seem like they've played at all since then. Maybe it's a coincidence, but I was satisfied with what I think the results are.

But I think it's a liability issue or some other specific reason why they can't tell us the result. But no evidence of the desired result shouldn't stop people from submitting reports. I do it any time I feel like it's a serious enough offense (if someone is being obnoxious or trolling I'll give them a strike in my mind and if they do it again I report them), because someone has to. And I know if I don't report them then definitely nothing will happen.