Purposefully? No, but I'll admit that during undergrad I mistakenly obfuscated code. We were competing in the Intelligent Ground Vehicle Competition (igvc.org), but I didn't really understand the "meat" of the problem very well. Instead of focusing on machine learning and simultaneous localization & mapping I got way too focused on the "multi-threaded architecture" of our robot and basically rewrote protobuf poorly rather than actually solving the problem.

I've improved in those areas since then, but I slap my forehead whenever I think back to those days about how stupid I was. The worst was that the whole time I thought I was so smart, too.