Postering has different legal implications depending on where you live. Is postering a speech act? Is expression in public places is valuable? You decide. You are responsible for your actions or your inaction.
For the record, this software comes "as is." The author makes no guarantees as to its applicability to your needs. While the author has no reason to believe that the Imprimatur software will cause you any hardship, consider this statement a universal disclaimer of legal responsibility.