For most of the posts that are removed, the reason is "off topic". Second most common reason is "personal attack".
For example, your post about U.S. dominance (quoted below) was clearly off topic in a discussion about
Germans who say "Nee":
QUOTE (gatzke @ Aug 1 2008, 6:54 am)

And the US is top-ten in per-capita GDP
http://www.aneki.com/richest.htmlAnd in absolute terms, US is double the absolute GDP of #2 (china)
http://en.wikipedia.org/wiki/List_of_count...y_GDP_%28PPP%29Although combined EU is greater, I still would not count the EU as a single entity. Even your countries have
countries.Also from the wikipedia:
"The 2005 U.S. military budget is almost as much as the rest of the world's defense spending combined [7]"
Plus we still have enough nukes to handle any significant situation that calls for a wrecking ball
http://en.wikipedia.org/wiki/List_of_count...nuclear_weaponsSure, you may have been replying to earlier off topic posts. But those have since been removed too. And you shouldn't have replied to them in the first place. Or if you simply must reply, then you should have split off by starting a new, separate topic.
As for you seeing lots of insults every day, well sure, you see the ones that are
not removed. Remember, however, you don't see the ones that
are removed. By very definition. So for all you know, 95% of insults are removed, and 5% remain. You see the 5%, but assume that to be 100%, because it's all you can see.
Also, moderation is not instantaneous. Sometimes a topic is only cleaned up the next morning. It's likely that you see insults and off-topic posts before they are removed.
Moderation doesn't, and can't, check every single one of the ~1,100 posts made per day. Instead we apply a "pressure" to keep general discipline. Members are expected to learn what is acceptable and what not, and then post accordingly.
If you see a post that warrants removal, you can use the
report function to alert the moderators.
As for a distributed community moderation system like Slashdot, if you'd like to program it for us then great! Unfortunately the system we use,
Invision Power Board, doesn't provide this function. Even if it did, it is not clear that it would work. TT gets
1% the amount traffic that Slashdot does, so the number of community members who would actively moderate would likely be so tiny as to be ineffective. But we'd certainly give it a try if we had the software.