This thread seems to have gone awry from the original point.
The original point is not that there should be less negativity, but that there should be less negativy in the wrong threads. (== off-topic and damaging to rest of discussion)
For example there was a topic about how Kobo would maybe start their own forums, that quickly descended in a rant-fest about kobo's bugs.
This kind of ranting is bad for the discussion and will ultimately drive people away from this forum. And that is a shame because there are lots of people here creating great tools and extras for the Touch/Glow or just helping other people with their problems, and they will leave for a different forum or just stop all together. You want to give Kobo a piece of your mind, not these users.
TL;DR Do you have something to complain/vent about? Thats ok, but do it in your own topic, and dont spam other topics with off-topic rants.