I think what GScholz is sayin'....
There are times at work where the people around me, or the clients, will propose something ridiculous. Then 3-4 or them will jump all over it like it was the greatest idea ever in the whole world.
I'm thinking "dumb".
But I'm also thinking "should I say it's dumb?"
I weigh the consequences of letting the project go forward vs pissing on everyones parade by, yeah, vetoing it.
Some cases it's just worth it to let it go, despite disagreeing. Ya gotta pick yer battles. Jumping into every one of them just makes you an arse.