In one of the published 5e campaigns there is a secret door that:
can be noticed with a successful DC 10 Wisdom (Perception) check.
The way I read this and the way I understand passive perception, that means that any character with a passive perception of 10 or greater would notice this without actively rolling for it. Since most characters are going to have a passive perception of at least 10 (or certainly you'd hope that someone in your party is above 10), isn't this secret door kind of.... not that secret?
Is there something in that wording that excludes the use of passive perception from noticing that door? or is it just meant to be a pretty obvious secret door?