Do you believe Internet profile pages to be fact? See details.

After reading a few questions on here over the past few weeks, I’m curious to know what other people think when they look over a profile page of someone they know little about.

Here a link of a question posted today that finally made me ask this question.

If you meet someone casually, then go look them up on Facebook, Twitter or the like, how do you take the info they post? as fact? opinion? Are you judging them harshly by their postings?