I only personally know about 4 people on here. But I have quite a few "friends" on my list. If I see someone who's posts I agree with or I respect or like, I will send them a friend request. It's not really a big deal at all.
The friends list on MiceChat isn't really like a friends list on something like Facebook. It doesn't allow you to "keep up" with anybody's posts or anything. It really just makes it easier to check their blogs, view their profiles and send them private messages.