In all seriousness, NSPs are a good source of work. As Cledry said, you gotta be willing to jump through hoops. Some locksmiths refuse, some don't. A good number of guys on ClearStar despise them. That's fine. I've found them to be no more unrealistic than large commercial accounts I've handled directly.
It's usually simple stuff but sometimes you get to quote on and win larger jobs. I enjoy the work, personally. It's usually storefront work with the occasional exit alarm or access control issue.
The trick with NSPs is to develop a repertoire with their staff. They won't hassle you over trivial stuff if you give them reasonable response times, pricing, and quality of work. They'll also treat you like a colleague instead of just a name on a computer screen. They usually have multiple contacts (your competition) in a given service area. Give them exceptional service and they won't even bother with the other guys. Do that with as many NSPs as possible and you'll be golden.