(Pro 20:25 KJV) It is a snare to the man who devoureth that which is holy, and after vows to make enquiry.
This is a common practice. Most people tend to speak before they think, buy without a test drive, vote without reading up on the issues. We marry on an emotional high. We join without reading the fine print. Sometimes it only involves a few extra payments. Sometimes it ruins our lives.
What is at issue here is mocking God. He is serious about His holiness. He is serious about His law. He wants us to be serious too.
So? Following Jesus is not a game nor a part time activity.