Reynard said:For the record, I agree with you. However, my experience is such that players do read the DMG and the MM and some players believe that the DM is "cheating" if he deviates from those rules. This isn't entirely unjustified, as some players build characters to interact with the game through the rules and rules changes affect their characters directly.
But why begrudge the 4E system and designers the ability to create helpful guidelines just because they are used inappropriately? (If I understand you correctly.) The rule system IMO isn't "taking power away from the DM" in the cases where the DM won't stand up and exercise reasonable authority over the game. What you describe as not "entirely unjustified" is something I'm sympathetic with. I'll tell players, for example, if horses are extinct IMC rather than have them build a cavalier type character and then find out the hard way - after all, it's reasonable to assume that the character would not have trained themselves as a cavalier if there were no such things as horses in the world in the first place. Players should be informed of common knowledge at the start where practical. How much more powerful will you be if you kill a minotaur? Well that's something you'll just have to find out.
Rather than throw out every guideline in the DMG, I'd rather the DMG just say "your DM has the final decision on how he implements any of the guidelines in this book, don't base your character build on them without consulting with her first.". But even the most rules-lawyerish people I've played with don't seem to have a problem knowing their boundaries, and I wouldn't have a problem reminding them (politely of course, we're friends mostly) if they did.