The problem is that by using this you probably are putting restrictions on people. Lots of places don't have a concept of public domain, so this license is unen

The problem is that by using this you probably are putting restrictions on people. Lots of places don't have a concept of public domain, so this license is unenforceable in many jurisdictions and your software defaults to being copyrighted with no license. Disclaimer: not a lawyer, this is just what company lawyers have told me in the past.