Well, it depends on how you like to live.If you ask me it's better if you never go to SDN, like ever.
If you enjoy trying to debate people who will never acknowledge any fact that goes against them, and that only use the material that helps them, then SDN is for you.
Also, if you read carefully what is presented, you will find that, as far as SW is concerned, the site is well researched and well presented.
I don't agree with all their conclusions, but it is well written nonetheless.
The only true problem I have is the lack of civility that some SDNers have towards anybody who doesn't agree with them.
But even on that count, they're not all like that.
Yes, most are complete SW fanatics, who would never want to believe anything in ST could hurt SW, but they are not all uncivil.
In a recent thread started by Vivtpf (from Spacebattles), there where a few SDNers who told another member that if he had nothing good to post, he should shut up and leave the thread alone, bacause all he was doing was bashing Viv himself, and not the arguments in the thread.
You can be rigid in your way of thinking, and not be a total asshole towards other people... :)