Originally posted by Sackett:

So if I was wanting to play with random people on a server, is that possible? Looks like you need a password to get on any server

Pretty much every server has a password because if it didn't, anyone could join, run to the main base, steal/destroy whatever they wanted, and then leave.

If you want to play with people, find out how to contact them, or host your own. There's a Looking for Group section on these forums.