I was told by someone that facebook itself was the devil. This made me think... Is it really? Well, here is my honest opinion. Facebook can be a good thing when used properly. Such as witnessing or sharing pictures with grandma.
2 Corinthians 5:20 Now then we are ambassadors for Christ, as though God did beseech you by us: we pray you in Christ's stead, be ye reconciled to God.
On the other hand facebook can be used in a bad way. I recently made a change on my personal facebook. I woke up every morning scrolling through statuses and picture updates of my family and friends. Occasionally it was littered with negative comments of someone, half naked pics, cursing and more. Seemed like it was always the same people posting this stuff. I decided I had enough. I believe you should set an example for others. But when you repeatedly have to weed through it gets discouraging and frustrating. I unfriended and prayed for each of them.
It's up to us to use our resources the way God intended.
If someone wanted to say facebook is the devil then so would all the social networks, media, telephone, computer, emails, instant messenger, and so on. Its up to us to choose whether our personal space will be used for good or evil.
May God Bless you on your journey.