Considering that some think you need to double click a link or button (like you do with almost anything in Windows as it is), this could explain a lot of the duplicates. Crossposting is a different subject. I guess this is something generally not worth reporting on as it's too minor. Obviously, cases like spam, flaming, etc. should still get reported, crossposting or not.
Also report on personal information -- emails, address, phone numbers, user names and passwords...
Especially the Pogo users .