You know what, the people like you that try to make CM's look like its their problem are the same ones I saw day in and out causing the so called "fastpass issue." It is not because of cast memebers sharing it, its thanks to guests learning on their own and finding out, its cast (or former cast) like myself who help to clear up what guests uncover. There is no rule that prevents me or any cast from talking about a system whose rules are available to anyone who reads the fine print or visits guest relations and asks for furthur clarification.
Before you try to put the blame on cast I suggest you take a look at what you, as a, forgive my term, "stupid guest", has done in the past. (taking that name from StupidGuestTricks.com, so please dont feel insulted) I can say with confidence that eveyone here who says its wrong to use it after its time has done it at least once (or considered it) and has found it to be easier to do then have someone like me act like a jerk and turn you away for 5 minutes or 5 hours.
The system is designed with the knowledge that guests will do this, and therefore it wont back up the FP line like some of you have suggested. When you see a bloated FP line it is usually thanks to a tour group (sometimes more then one) or a mix of a lot of FP and a lot of Guest Assistance Pass using guests and ride re-entry and rider switch passes.
Please dont be quick to place blame or discuss things of which you do not know. Cast know their limits of what can be shared with guests, some go beyond what should be shared, but only because they are excited by the job they do and they continue to work at a very very low paying job to enjoy the moments when they can truly making a day magical for a guest. That is why I stayed, and if it meant explaing FP in more detail then Disney markets, then so be it, because I made someone's day better.
Here is a quote once shared with me by a Disney manager when I first started and acted like I knew it all about Disney. It fits some of what I have read all over these boards since I started visiting: "You dont know what you dont know."