Embarrassment is the first. Additionally, the law provides for the owner of a copyright to recover damages for unauthorized use of copyrighted music. Churches, schools and not-for profit organizations can be infringers, too. Professional musicians in most schools and churches know the reasons for the law and therefore would not derive satisfaction from doing something against it. Such action forces the price of legal editions higher.
Perpetrators risk dishonor from professional colleagues who understand the law.
They also risk fines and jail sentences if taken to court. Postlude Plainly stated, making unauthorized copies of copyrighted material is strictly illegal. However, music publishers desire to have their songs used as much as possible, so in many cases permission can be obtained, but you must contact the copyright owner prior to use or duplication. By the way, Music Publishers' Association, OCP Publications, and New Dawn Music prepared these guidelines. No copyright is claimed for these guidelines.