A: Yes, they can. Camouflage doesn’t protect your Keeper, just makes it harder for people to know what it is (they might remember, they might not, or might not have seen it at all, if you played it face down in the first place). Generally in Fluxx games, Keepers hidden under other cards cannot be traded or stolen – but the card they’re under is usually still vulnerable. In the case of Camouflage, your card itself is not hidden, only its identity.