No.. I never though about deleting my facebook. It's the only way I can keep in touch with my family around the world. It's because of Facebook I'm in touch with old friends, who I thought I would never talk to again (I was a military brat).
One thing negative about being a Navy family is your constantly moving every 2-3 years. It was hard on me as a kid, which is why I want my kids to have home roots, something I don't have.. So Facebook is a great way to reconnect..