Welcome to the social & mobile age. Many people no longer post in the correct thread, correct forum or even the correct part of the site. Mobile users accustomed to social media are oblivious to how a forum works and completely ignore the basics of forum software functionality. They just post away anywhere. Its a trend that has been picking up steam in the last year. We even had to close our top listed node to reduce this. But if this continues then it will become a very disruptive problem. Not unlike how mobile use required forum software to have responsive design. I hope that XF2 will bring some solution, but unfortunately I have not been able to come up with many suggestions for solutions.