[baberuth]

I'm not super concerned about confidentiality for my code, but then again I'm not doing anything groundbreaking.

Mostly, if I cared about confidentiality, it'd be so I don't get publicly embarassed for crappy code.

Rating systems for reviewers would also let people build reputations so that reviewee's could feel more comfortable about code confidentiality.

Stack overflow already has reputations built in, so as I mentioned, it might just be awesome as a feature for SO. And another revenue stream, if they weren't already swimming in cash.

[frobozz]

The main confidentiality issue is not about whether you, the coder, cares about people stealing your groundbreaking idea. When you are doing work for hire, the code is not necessarily yours to publish.

Whilst sharing it with someone you could refer to as a colleague, employee, or contractor might be OK. Sharing it with the world, or someone who might share it with the world, is not.