This is something that I've found frustrating in other communities, and it's beginning to pop up here. When someone proposes an idea, without specifics, please treat it that way. Consider all the ways that it could be implemented and discuss the pros and cons of each. Don't jump to a negative implementation and assume it can't be done because of that picture in your head. =/
I fully agree with you, people consider ideas way too specific, I mean seriously the game isn't even in Alpha yet.