As a full-time freelance writer... guffaw.
Man, us writers are such hysterical types.
Drifter Bob: If you're going to be a game writer, I just have one thing to say... SUCK IT UP.
Game writing requires working within a rules framework. That's what makes it game writing rather than, say, 'host a murder' or Choose Your Own Adventure. Or scripting a computer game. If you want to do one of those others, go ahead.
See, the reason you have to work within rules is because ultimately it's not YOUR story, it's not YOUR game. It's the game of someone who bought the adventure. If you make up a bunch of stuff that doesn't fit within the rules, it means the person running the game has no idea if your vision of how things fit together will jibe with what they made. If it does, great. But if it doesn't...
Adding a few ranks of Bluff out of the blue, without using any rules, won't make a big heap of difference. The problem is that people might wonder either 'does he understand the rules?' or 'what else is he making up that perhaps I didn't notice?'
These are bad because they can cause the adventure to implode. The most dramatic would be something like 'Oh. If we combine element A and B, the world ends/we become gods/etc.' Which then requires a patch. Which might lead to another patch. Which then leads to realizing the entire setting no longer makes sense, so we must retcon X, change Bob's backstory, and so forth. The rules to an extent help ensure things are consistant with itself and anything added to the game.
It's bad enough having to look up/remember some rule in the midst of the game (how does grapple work again? Flip flip flip. Oh, right) It's worse to have to make up rules in the middle of the game. (Ok, a balor's whip is sort of grappling but not. Er. How do you escape? Um. Damn, the MM got vague, bastards. Let's treat it like regular grappling) It's much worse to realize that you have to make some far-reaching decisions 3 hours into a game you drove 2 hours to get to.
Oh, and to wrap up... coming in saying that a bunch of people suck and the game you're writing for is kinda crappy and so forth is probably not a recipe for positive thread. Getting huffy because the thread is then not positive is, well, fishing for drama.
Game designers have enough negative crap thrown at them for no reason whatsoever. Seeking it out is a little bizarre.