iserith
Magic Wordsmith
Is it really necessary to have a consequence other than lack of success? Most things sort themselves out - fail a knowledge check, don't know the potential info; fail the detection check, don't detect the treasure or threat. Does there really need to be the risk of something more stacked onto that?
I don't worry about the chorus of "Can I roll, too?" because I have all the characters in position to either know or detect the same thing make the check. Then I start with the lowest roll in giving out results of what they know/perceived/whatever.
There needs to be a meaningful consequence of failure in order for there to be an ability check because that's one of the two criteria by which the DM calls for a roll. It's up to the DM to decide what that means in context though, so reasonable people can disagree on what is or isn't meaningful in the abstract.