I'm the guy who floats lofty, underdeveloped ideas only to have them dismantled before they have a chance to blossom. I hate it. I react poorly to it. The problem isn't that that happens; it is a necessary part of the process, the part where you objectively examine the idea and filter out the bad ones. What frustrates me is when such contemplation tends to bury ideas instead of simply bringing them down to earth.

These posts offer insight on maintaining the spirit of an idea in spite of the devil's advocates, naysayers, and poo-pooers:

Death by Devil's Advocate
The Concept Clarification Effect
Keep the sharp edges!
Because that's the way we have always done it...

"Imaginative ideas are subject to be shattered and annihilated by contact with the practical."
~unknown