I think one of the big problems is that Bethesda steals from mods and don't contact the modders. It would be one thing if they contacted the modders and say; "Hey man, we love your mod and want something like it or something that was inspired by it in our game or DLC."
Most modders wouldn't mind and would be extremely flattered if Bethesda did something like that as most modders mod for fun and for a passion for the game and not money and getting a little recognition from Bethesda is all they need. I mean, games, movies and tv shows used to add stuff from fan contests or fan works into their works all the time.