Why is using a licensed security alarm company important?

There are many alarm companies doing business in and around the Washington DC, Maryland, and Virginia area that are not licensed. This may reflect on the quality of the company. Do you want to work with a company that blatantly cuts these corners? But more significantly, if there is an issue and you try to make a claim against the company, their insurance company may not cover the company if they are operating outside of their licensed business area.