@koaftder
Spend less time playing lawyer, and more time writing code.
Same to you, sir.
All material you create (released or not) remain copyrighted, unless if you explicitly place them in public domain. "Released to public" doesn't automagically mean "public domain".
If the license is (legally) unclear or vague, the copyright is the default, and you can't redistribute. In such cases the only (legally solid) way is to try contact the original author somehow and ask for permission (google can do wonders here).
This might seem anal, but this is how it works.