Facebook now has more than 300 million users, but if there's all this talk about "friending" people, why is "unfriend" Oxford English Dictionary's word of the year?

As Facebook has grown, so have the number of eyes watching your page.

"I have children, I had one friend have some pictures of us partying and I had to delete some pictures," said Facebook User, Lisa Brown.

Work can be even trickier. Many feel obligated to accept co-workers or bosses, only to realize the consequences later.

"Like if I'm at work and I update my status someone just might tell my boss she was on the internet while she was at work," said Facebook User, Kristie Rice.

"Especially if you feel crappy at work and you say something on Facebook. You have to really find the right words for it," said Facebook User, Zee Fitzgerald.

Facebook's ease of keeping in touch has lead to information overload. Too many acquaintances, seeing too many pictures, knowing too much information.

"All these people are sort of saying same thing - Wait a minute, I have all these people I don't know or I've kind of let this get out of control," said Michael Sommermeyer, a social media blogger who has followed the evolution of these sites.

He suggests a friend strategy - Separating your friends into categories: Professional, Friendly and goof-off.

"So maybe what you need to do is look at it and say what category does everybody fall into and do I want them crossing the line," Said Sommermeyer.

And if you're already friends with them, "Unfriending" might be necessary.

"Unfriend" is the Oxford English Dictionary word of the year, for a reason.

"I don't really have anything to do with them, so I just unfriend them," said Facebook User, Aubree Toledo. "I'm not trying to be mean!"

But it's not always easy. Summermeyer says just be honest, and upfront.

"You have to be able to go to a friend and say it's nothing personal."

The politics of unfriending can be tricky, but experts say unfriending not only protects your online identity, but can make these sites much more rewarding. Following people you actually want to know about, instead of everyone you've ever met.