Beyond that, these kinds of threads are currently scattered amongst Ads, Constructive, and Shout in the Dark. That's not really helpful, and proves how much they don't really have a home. If (generic) we are serious about growing this hobby and improving things, having a designated home for this content -- and to encourage the creation of games and innovations in existing ones -- it needs its own space.
It is actively heartening to pop into some of the threads where people are brainstorming like this. Others, yep, personal experience included, become nightmares of 'I hate that and it's just stupid because it's not what I like' or endless 'unless it's just like <other thing> it's going to be a piece of shit' or 'this thing (that almost every game does with no ill effect) will completely destroy this if you allow it to occur!' kinds of garbage.
These are the kinds of things that aren't constructive, aren't well-thought-out, aren't even thought out on the most basic level, and yet... people end up responding to them at length to either clarify or reassure or just defend themselves from personal attacks piling high (ALL OUTSIDE THE PIT) based on the most absurd nonsense.
That gets in the way of someone making a game purely based on how much time is being wasted dealing with a parade of Chicken Littles and shit-flingers and One True Way-ists in addition to how annoying, frustrating, and discouraging it is. Especially since most of these people would never play there anyway -- so it's not even a matter of 'oh well you'd have to deal with this on a game from the same people, too'. Well, that kind of shit is generally not allowed to go on for pages on end on most games, and that's the case for a very valid reason.
How the same people -- and I'm talking about the communal pool of everyone in the hobby here -- can't internalize 'this would be shitty behavior on a game that would never go on like this without everyone calling it absurd and obnoxious' can think it's perfectly reasonable and not equally absurd and obnoxious here sometimes blows my mind.
We have space for absurd and obnoxious, and it shouldn't be in brainstorming/creation/concept/innovation threads.