is it okay to add unknown people on Facebook?

[gvoudzon]

I've heard that you could go up to 5000 friends on a FaceBook account and have seen a number of local TV celebrities doing so. Usually many of them seem to convert their FaceBook page, into a fan page when they get up to 5000 so that the page becomes unlimited then.
One downside to having many friends on FaceBook is that it starts to take up more system resources for a web browser to display them all and it becomes hard to do on an old computer.
Who you would like to have for a friend on FaceBook is a matter of personal preference. Some people will accept anyone's friend request, regardless of whether they know them or not, whereas others will only accept friend requests from people who they are friends with in real life.
Do you think those TV celebrities know very many of the people on their FaceBook pages? They probably have one FaceBook page for their public life, named something like MarkJohnsonTV or MarkJohnsonWeather, that someone at the TV station office manages for them, and then they have another one for their private life, named something like MarkJohnson, that only their closest friends know about.