Americans wont require visas to visit Schengen countries like Poland,That's because American's don't over stay their 90 days allowed stay time without a visa in Schengen countries like Poland.
(This has been explained very clearly now multi times here)
In fact so many Polish want to live in the Great United States of America that they abused the visa system merely to get a free ticket into America without any intentions of ever returning back to Poland again.
The United States of America Immigration finally said 'enough' and now require much more stringent visa measures to apply for entry to the Great United States of America, the Home of the Brave and the Land of the Free.
Now that we have explained that to the whiners that think Americans should be punished for a privilege that we do not abuse like they do we can hopefully put this one to rest once and for all.