http://borderlands.wikia.com
Lots of info there.
I've been turned off from this game for two reasons:
1. Friends don't play it anymore
2. Everyone uses hacked weapons
There are also people who mod their characters and just by joining your game they can alter your character's stats whether you want to or not.
It was a great game before all these bad modders started distributing their modded [censored] to everyone. It's kind of like how PSO turned out.
Why should someone else play the game the way you want them to play.
Theres nothing wrong with using mods or haks with this game.. you kinda have to if you want to keep on playing and keep on having fun.
Instead of putting a stop on modding they should just release a toolset editor. For sure it will bring back alot of players to the game.
Borderlands timeline:
Release ----------- Oct 2009
Death ------------- Nov 2009
Toolset release -- Hopefully 2010
Revival of game - Whenever toolset is released