I'd like to use this module, but it would be illegal. The license is completely vague and unenforceable, and because of this it is not safe to assume this code is legal to use.
This is a restrictive license. Some people, like say Richard Stallman, believe that it is unethical to use any restrictively-licensed software. That means that any choice to use this software may be considered unethical and is therefore not allowed under the terms of the license.
Why not just use a license that copyright lawyers have already looked at and deemed not unenforceable?