What mz said (it is a corral, though not one without its perks). Though I would say you want to ditch the hex editor as soon as you can. It might be one of the first lines of attack but if you are doing actual work in it then something has probably gone wrong somewhere.
Also sometimes the requests are simple enough, sometimes they might have already been done (and while the searching and sorting here is pretty good there might be a slightly different phrasing, it might be buried in a greater hack set, it might be available for another system...), sometimes people just need a bit of a push in the right direction, sometimes someone might have a good idea that is easily executed and is something I want to play myself, sometimes it might just be a minor problem with their execution (between the hundreds of emulators, patch formats, flash carts, interesting ideas about ROMs, cheat programs, cheat formats... it can be a pain for those not already versed in the ways of things -- chuck me and all that I am into say N64 high res texture modding and I would have a great deal of learning to do, similarly I am many years out of knowing the magic phrases one needs to utter to get PS1 emulation plugins to work, what hope does the simple forum goer have if there is some ambiguously worded readme as their only guide to it all?), sometimes someone might point someone at a game they have not heard about before (especially if it is "good but for this one problem" -- I have learned of a few games and versions thereof from here before) and the list goes on.
If you come in here expecting anything other than basic civility or to be ignored then you probably missed the point. While I am at it I should probably make you aware that ideas are worthless, always have been. Prototypes, work attempted and actions on the other hand.