Then they should use a modicum of energy to find the answer as well, instead of expecting someone to hand them a (correct or not) answer. Might even learn a bit more than the answer to the question.

They do if making the most cursory of searches would have told them. It’s not like a downvote is a huge punishment either. Just makes pointless questions easier to sort away.

Try the game Warewolf (same concept goes by many other names). Most people find it really hard to lie, even if it is about nothing important at all and part of the agreed “social” rules.