First of all understand that you are talking about 2 different things. One is the throwaway room, which in essence is an offsite guest books a room/ campsite a night which gives them the opportunity to get certain benefits. The concept as originally discussed on this thread was for the guest to be able to book FP's at the 60 day mark instead of 30, mb's for the family, parking for the days on property(arrival and departure day if you book one night), adr's slightly earlier(prb only relevant if you want bog). The original concept involved the guest paying for the room but not sleeping in it, hence the name throwaway.
Other strategies have since come into play but not necessarily tied to the throwaway ie...cancellations after booking, but what you are talking about along with others on the thread relating to the extra fp's / magic bands really is not specific to the throwaway and there are other threads that deal with that which might be the better place to ask about that. Im sure though someone here might also give you advice, but I mention this because I've noticed various comments which seem to be confusing the throwaway with the MB strategies.
Im not going to offer you any advice on the MB strategies since I only know what I've read on the other threads and havent personally had any experience with it.
Sorry if I confused the issue by referencing "MB hoarders." That is a different issue from booking a throw-away room, although there is some crossover into this territory because one of the ways to GET those extra MBs is to book a room and then cancel.
As far as ethics/rules are concerned, my advice is "let your conscience be your guide." It's not unanimous, but the general consensus is that booking and paying for one night onsite (whether or not you actually sleep in the room) is not unethical since you are paying for the room just like anyone else.
Even if it were not ethical, doing so is not against the "rules" (in fact, conventional wisdom is that Disney probably welcomes people spending extra on a room - even a "throwaway" room - in order to get those perks).
Booking a room to get the perks, and then cancelling the reservation is treading into different territory IMO. And then there's the extreme end of the spectrum, which is obtaining multiple sets of MBs (by booking and cancelling reservations or by any other means) and getting essentially unlimited (subject to same day availability) FPs by using bands that are not associated with that day's admission. But that can be accomplished without booking a throwaway room and, conversely, booking a throwaway room does not equate to doing that.
Again, just my opinion, but I think you are not breaking any rules by booking a room to get the MBs, 60-day booking window, parking, EMH, use of the pool, etc. When you book the onsite room, you are
paying for those associated perks. You are also paying for the right to sleep in the room that night, but whether you do or not is irrelevant.
These days, I usually stay onsite anyway, so maybe I don't have "a dog in this hunt" but I could see another benefit to a throwaway room (that I alluded to above)...
You can take a midday break (nap in the room or use it to change and go swimming in the resort pool) without having to travel offsite. This would save time and be an enjoyable "onsite" midday break. And it also absolves you of the sin of "not using" the room.
I'm sure someone will come along and tell me this idea is inconsiderate because taking a nap in the room means that mousekeeping now has to change the sheets even though you didn't spend the night in that room.
