I didn't bring this up because it happens all the time. In fact, I haven't had this happen often. It was just something I was curious about. 
One particular example is someone not liking a particular rule that has little to nothing to do with the RP experience itself (of course, that might be debatable since it's in the RP to begin with). If they were to bring up the fact that they don't like the rule and don't wish to follow it, should that rule be reevaluated or should it be imposed regardless?

What about things like the requirement of using the exact CS format suggested/requested by the GM. Should a differing CS format, that has all the same information, be rejected?

You know, stuff like that. One time things that might come up occasionally.

Also, should RPers be free to suggest how one might run the RP or even the way a plot develops? How far is too far for an RPer to "go against" the GM?