You'll notice on that message board system, they apparantly don't have a flood control feature, or don't have it enabled. Those posts were made seconds after each other. With our flood control feature, that's impossible.
You can limit new threads and/or replies to be made by a certain amount of ime - recommended a minute for new threads. If they can only post a new thread once per minute, then that can't happen.
Flood control works on guests as well as registered members, so they can't do it either.
I like both ideas there - a feature to delete all posts by a username would be good, and an option to limit number of posts per day for users would be good too. And maybe the option to limit the number of posts guests can make too per day - ALL guests though, not just the one. That'd stop people using different IP addresses too....
All on the to-do list.