Wrong section...
Really, you are in the correct one. However, there is nothing wrong with telling someone they're in the wrong section when they are. It disservices the audience who is in a specific forum looking for specific threads. Also, it is (usually unintentionally) a disservice to the OP who isn't reaching their target audience. Once they know, they can request the thread to be moved, which helps all parties involved.
Basically, get off your high horse.