I have seen a lot of different games going on and I am seeing player's respect the DM less and less because the player's have this notion that the game is all about them and as long as they are having fun then everything is where it should be. I have read many many threads about the player's feeling entitled while the DM is there to cater to them.
That however is a problem with the players at that particular table in general, not with the game specifically fostering that kind of behavior.
All of the games that we are talking about here have specific "instructions" that players should run their "ideas" by the DM as he's the one running the game.
All of these games encourage the DM by letting him know that he's the one in charge of running the game, and that the game needs to be fun for ALL. The DM is also part of that ALL.
When some guidelines say, "say yes." What they are recommending is that the DM should consider why he wants to say NO. If after he considers it he deems that it's not really warranted then he should consider saying YES. A lot of people say no instinctively without even considering the issue, it's simply easier. So the DMG recommends at least considering the alternative. Is that a bad thing? Does that suddenly relegate the DM to second tier? NO, it's simply a good recommendation. If I said NO to everything my kids ask to do, they'd be cooked up in the house until they were of legal age. At times I have to take the time to reconsider why I'm saying no. Is it out of a valid concern, or because it's simply the easy way out?
Yes, some people might "feel" empowered, and others not by these recommendations. Isn't that the same with everything? The book makes recommendations, how people feel about them is a completely different thing.
I think that as the game has progressed the DMs have been given better tools to evaluate whether a request is reasonable, and whether allowing it is not going to break
their game.
As someone mentioned they found some things unpalatable and excised them. Did the game all of a sudden stop and the world end? No, the DM made a value judgement, that only he could make because he's the only one that knows the individuals at that table. He decided to make an informed NO, rather than a hasty and expedient one.
The newer guidelines help a lot with making those informed, well-thought out decisions rather than the emotional, knee-jerk ones.