How long does it take until something offensive or antagonistic you reported gets reviewed by an admin and decided whether it gets removed or not? Do they review something that only got reported once or do you need to collect a few reports for it to reach the admin's desk?
Well, reports are only seen by the admins, and there are four admins, and they need to check them and decide on it.
But if an offensive or antagonistic opinion/opinion comment is seen by a moderator, or question/opinion/opinion comment seen by a super/uber moderator, then if they decide to hide it, then it will be hidden.
There are moderators that browses the site seeing what need to be removed. They are usually quick about removing offensive material. If something is report I'd imagine that the moderator will get a notification.
Everything that gets reported even once shows up for us to review. As for how long it takes, it depends on when we're online but we check reported posts every day so everything gets reviewed within at least 24 hours. If a reported post does not get removed within 24 hours, it means we decided it did not violate the posting guidelines.