On a side note, I really a appreciate that threads rarely get locked here on f.DS. I went back to Smogon's forums briefly when the latest Pokémon games came out. Threads get locked and posts deleted constantly over there these days. It's a very disorienting and unwelcoming atmosphere.
Smogon has way too many users, and a lot of them are pretty bad, too.
I think it's mostly just that smogon just casts a way wider net than f.ds does -- we kind of self select for a more mature user base. I promise when they come out with the Pokemon/Dominion crossover game, we'll see a flood of well-meaning but socially inept users also.
Not that we don't have our share of well meaning but socially inept users, but at least they're politer here.