Or many more, lol! Over 50 of my fb friends are family. By the time you add in childhood friends, undergrad, grad school (x2), work friends through the years, friends from clubs, community activites ... it adds up!
I don't spend a lot of time there because I've muted a ton of people. It's not the same as 'ignore' on a message board. You can still see a muted friend's stuff if you go to their page. Muting cuts out those people who post a lot and clog up your newsfeed.