Congrats. Since you got what you wanted, I guess it was worth it...
As for the second think, I don't think it'd work simply because it's a hassle, sending PMs here ain't exactly smooth so it'd take ages if we have to answer every single report we get. Specially when a lot of people report the same post, which happens a lot. In the end, if we ban it you can see it, if you don't see anything, the reported one either got a warning or was deemed not worthy of action. If you're really that worried about if an action was taken or not you can simply ask any mod out there and he can check the mod history.
As for whether or not you should report people, you shouldn't be asking yourself that. You ALWAYS have to report people, if the report is increidibly stupid we'll just delete it and move on, it's not like we'll hold a grudge with you for wasting our time and then plot secretly to ban you for a very minor thing. People shouldn't expect for every report to result in a ban, but it's not like they only should report posts that are obvious bans....those are the ones that flood the mod queue, after all, not the "in the end, it wasn't bannable" reports, so the latter don't really annoy us
