They are used and misused. They are frequently used to ensure loyalty preventing an employee from joining a competitor, which is a misuse of the agreement as agreements should not be used simply to prevent competition. A proper use is to prevent unfair competition.
Whether or not the agreement is ultimately enforceable, companies use the threat of litigation to compel compliance. Whether to comply or resist is therefore a business decision.
A duty of loyalty is still owed to your employer until you resign. This means that you cannot compete against your employer while you are still employed. Remember that if litigation is commenced, electronic discovery is both intrusive and revealing.
The employer needs to show that the agreement must be enforced to prevent the misuse of confidential information. The employer has the burden of proof in showing not only that the information is proprietary, but also that adequate steps have been taken to protect its confidentiality.
The short answer is yes. For more specific information, you should speak to an experienced employment law lawyer.
For answers to additional questions, please contact The Law Office of Stephen Roger Bosin, Esq., to set up a free consultation with an attorney, by calling today.