I've heard this a few times. I know some friends had this question too. There are some variance, but the context is the same: "Look this guy, he started facebook when he was 19 and he's now a billionaire, why don't you try the same?"
Maybe it's my social context...
I get sent articles with stories like '16 year old creates app, becomes millionaire' with the email title 'you make apps, don't you? So I have an idea...'. And yes, also, at every birthday party; 'can you hack into blah and deface that fraud, because he scammed me!'.
I run an email security business, we do fraud prevention and monitoring for businesses and brands. I get multiple inquiries a week to "hack a mailbox"...
Or even "can you fix my printer?"
Haha classic. For me that'd be: "I've got an app idea."
I got this one from one of my mates in school: "Can you please install Gentoo on my toaster?"
the "can you hack X" I get most often. But also questions to help with random programs I sometimes never even heard of, that they use at their job or whatever :D