Most of the time I get a response from the moderator who handles the issue, but if I do not, whoop-dee-doo.
I can usually see they took care of it while perusing the thread list, and if not, no real skin off my nose. Most of the time I report a Bad Post is to note that a topic is already being discussed in a current thread, not to report bad behavior (I've been fortunate that most of the forums I frequent seem to be well-behaved, in general).