Buyer's Rep Agreements

Our company is complying with a state license law that requires the office to keep a copy of a Buyer's Representation Agreement on file in the office, 2 days after obtaining a signature. It'll be interesting to see how many of these start flowing into the office.  A lot of agent's say they are working with buyer's all the time and there really is no evidence of that unless the buyer's sign a contract to purchase.  Many people hate these agreements, and don't want to sign one.  They say they are just looking and don't want to be locked in to anything.  I realize it is a good business practice, as you are protecting yourself from working with buyer's who aren't serious, or who may just wander off and never be heard from again.  I know this has been beat to death on AR, but what are some good scripts to come up with to tell buyer's that it is in their best interest to sign an agreement with you?