If anyone says "Who Would Be Stupid Enough to fall for that?" or anything like it, you can be almost guaranteed that we'll see someone show that, yes, they are stupid enough, no matter how obvious the Schmuck Bait. This is also useful for summoning The Ditz to volunteer to do the aforementioned stupidity.
If you don't want someone to do it, you are clearly Tempting Fate. Anything too stupid for [...] [tvtropes.org]