Sure, but why? Because it's difficult? Because it's useless newfangled morally-corrupting stuff?
Not using the web ... should be considered a commendable feat, too.
Again, why? The web is useful. Is it also commendable to cook all your own food from scratch, do all your laundry by hand, avoid use of electricity, etc?
Facebook's seemingly innocuous site has turned out to be an incredibly intricate mmorpg where your character is some uncannily "realistic" version of "you," and whose map slowly begins to dominate your territory. It is an extremely addicting game for some of us.
Because it's a socially dividing privacy issue to want to involve yourself with social media; even if you choose to use it passively.
Is it also commendable to cook all your own food from scratch, do all your laundry by hand, avoid use of electricity, etc?
Yes, it is, but i'll leave it as an exercise to the reader to discover as to why such things may be commendable.